The difference between Line and String

Line as a noun (geometry):

A path through two or more points (compare ‘segment'); a continuous mark, including as made by a pen; any path, curved or straight. An infinitely extending one-dimensional figure that has no curvature; one that has length but not breadth or thickness. A line segment; a continuous finite segment of such a figure. An edge of a graph. A circle of latitude or of longitude, as represented on a map. The equator. One of the straight horizontal and parallel prolonged strokes on and between which the notes are placed. The horizontal path of a ball towards the batsman (see also length). The goal line.

Line as a noun:

A rope, cord, string, or thread, of any thickness.

Line as a noun:

A hose or pipe, of any size.

Line as a noun:

Direction, path.

Line as a noun:

The wire connecting one telegraphic station with another, a telephone or internet cable between two points: a telephone or network connection.

Line as a noun:

A clothesline.

Line as a noun:

A letter, a written form of communication.

Line as a noun:

A connected series of public conveyances, as a roadbed or railway track; and hence, an established arrangement for forwarding merchandise, etc.

Line as a noun (military):

A trench or rampart, or the non-physical demarcation of the extent of the territory occupied by specified forces.

Line as a noun:

The exterior limit of a figure or territory: a boundary, contour, or outline; a demarcation.

Line as a noun:

A long tape or ribbon marked with units for measuring; a tape measure.

Line as a noun (obsolete):

A measuring line or cord.

Line as a noun:

That which was measured by a line, such as a field or any piece of land set apart; hence, allotted place of abode.

Line as a noun:

A threadlike crease or wrinkle marking the face, hand, or body; hence, a characteristic mark.

Line as a noun:

Lineament; feature; figure (of one's body).

Line as a noun:

A more-or-less straight sequence of people, objects, etc., either arranged as a queue or column and often waiting to be processed or dealt with, or arranged abreast of one another in a row (and contrasted with a column), as in a military formation.

Line as a noun (military):

The regular infantry of an army, as distinguished from militia, guards, volunteer corps, cavalry, artillery etc.

Line as a noun:

A series or succession of ancestors or descendants of a given person; a family or race; compare lineage.

Line as a noun:

A small amount of text. Specifically: A written or printed row of letters, words, numbers or other text, especially a row of words extending across a page or column, or a blank in place of such text. A verse (in poetry). A sentence of dialogue, especially in a play, movie or the like. A lie or exaggeration, especially one told to gain another's approval or prevent losing it.

Line as a noun:

Course of conduct, thought, occupation, or policy; method of argument; department of industry, trade, or intellectual activity.

Line as a noun:

The official, stated position (or set of positions) of an individual or group, particularly a political or religious faction.

Line as a noun:

A set of products or services sold by a business, or by extension, the business itself.

Line as a noun (stock exchange):

A number of shares taken by a jobber.

Line as a noun (historical):

A measure of length: A tsarist-era Russian unit of measure, approximately equal to one tenth of an English inch, used especially when measuring the calibre of firearms. One twelfth of an inch. One fortieth of an inch.

Line as a noun (historical):

A maxwell, a unit of magnetic flux.

Line as a noun (baseball, slang, 1800s, with "the"):

The batter's box.

Line as a noun (fencing, ‘[[line of engagement]]’):

The position in which the fencers hold their swords.

Line as a noun (engineering):

Proper relative position or adjustment (of parts, not as to design or proportion, but with reference to smooth working).

Line as a noun:

A small portion or serving (of a powdery illegal drug).

Line as a noun (obsolete):

Instruction; doctrine.

Line as a noun (genetics):

Population of cells derived from a single cell and containing the same genetic makeup.

Line as a noun:

(perfusion line) a set composed of a spike, a drip chamber, a clamp, a Y-injection site, a three-way stopcock and a catheter.

Line as a noun (ice hockey):

A group of forwards that play together.

Line as a noun (medicine, colloquial):

A vascular catheter.

Line as a verb (transitive):

To place (objects) into a line (usually used with "up"); to form into a line; to align.

Line as a verb (transitive):

To place persons or things along the side of for security or defense; to strengthen by adding; to fortify.

Line as a verb:

To form a line along.

Line as a verb (transitive):

To mark with a line or lines, to cover with lines.

Line as a verb (transitive, obsolete):

To represent by lines; to delineate; to portray.

Line as a verb (transitive):

To read or repeat line by line.

Line as a verb (intransitive, ‘line up’):

To form or enter into a line.

Line as a verb (intransitive, baseball):

To hit a line drive; to hit a line drive which is caught for an out. Compare fly and ground.

Line as a verb:

To track (wild bees) to their nest by following their line of flight.

Line as a noun (obsolete):

Flax; linen, particularly the longer fiber of flax.

Line as a verb (transitive):

To cover the inner surface of (something), originally especially with linen.

Line as a verb:

To reinforce (the back of a book) with glue and glued scrap material such as fabric or paper.

Line as a verb (transitive):

To fill or supply (something), as a purse with money.

Line as a verb (transitive, now, rare, of a dog):

to copulate with, to impregnate.

String as a noun (countable):

A long, thin and flexible structure made from threads twisted together.

String as a noun (uncountable):

Such a structure considered as a substance.

String as a noun (countable):

Any similar long, thin and flexible object.

String as a noun:

A thread or cord on which a number of objects or parts are strung or arranged in close and orderly succession; hence, a line or series of things arranged on a thread, or as if so arranged.

String as a noun (countable):

A cohesive substance taking the form of a string.

String as a noun (countable):

A series of items or events.

String as a noun (countable):

The members of a sports team or squad regarded as most likely to achieve success. (Perhaps metaphorical as the "strings" that hold the squad together.) Often first string, second string etc.

String as a noun (countable):

In various games and competitions, a certain number of turns at play, of rounds, etc.

String as a noun:

A group of racehorses kept by one owner or at one stables.

String as a noun (countable, computing):

An ordered sequence of text characters stored consecutively in memory and capable of being processed as a single entity.

String as a noun (music, countable):

A stringed instrument.

String as a noun (music, usually in plural):

The stringed instruments as a section of an orchestra, especially those played by a bow, or the persons playing those instruments.

String as a noun (in the plural):

The conditions and limitations in a contract collectively.

String as a noun (countable, physics):

The main object of study in string theory, a branch of theoretical physics.

String as a noun (slang):

Cannabis or marijuana.

String as a noun:

Part of the game of billiards, where the order of the play is determined by testing who can get a ball closest to the bottom rail by shooting it onto the end rail.

String as a noun:

The points made in a game of billiards.

String as a noun (billiards, pool):

The line from behind and over which the cue ball must be played after being out of play, as by being pocketed or knocked off the table; also called the string line.

String as a noun:

A strip, as of leather, by which the covers of a book are held together.

String as a noun (archaic):

A fibre, as of a plant; a little fibrous root.

String as a noun (archaic):

A nerve or tendon of an animal body.

String as a noun (shipbuilding):

An inside range of ceiling planks, corresponding to the sheer strake on the outside and bolted to it.

String as a noun (botany):

The tough fibrous substance that unites the valves of the pericarp of leguminous plants.

String as a noun (mining):

A small, filamentous ramification of a metallic vein.

String as a noun (architecture):

A stringcourse.

String as a noun (dated, slang):

A hoax; a fake story.

String as a verb (transitive):

To put (items) on a string.

String as a verb (transitive):

To put strings on (something).

String as a verb (intransitive):

To form into a string or strings, as a substance which is stretched, or people who are moving along, etc.