The difference between Flat and Planar

When used as adjectives, flat means having no variations in height, whereas planar means of or pertaining to a plane.

Flat is also noun with the meaning: an area of level ground.

Flat is also adverb with the meaning: so as to be flat.

Flat is also verb with the meaning: to make a flat call.

check bellow for the other definitions of Flat and Planar

  1. Flat as an adjective:

    Having no variations in height.

    Examples:

    "The land around here is flat."

  2. Flat as an adjective (music, voice):

    Without variations in pitch.

  3. Flat as an adjective (slang):

    Describing certain features, usually the breasts and/or buttocks, that are extremely small or not visible at all.

    Examples:

    "That girl is completely flat on both sides."

  4. Flat as an adjective (music, note):

    Lowered by one semitone.

  5. Flat as an adjective (music):

    Of a note or voice, lower in pitch than it should be.

    Examples:

    "Your A string is too flat."

  6. Flat as an adjective (of a tire or other inflated object):

    Deflated, especially because of a puncture.

  7. Flat as an adjective:

    Uninteresting.

    Examples:

    "The party was a bit flat."

  8. Flat as an adjective:

    Of a carbonated drink, with all or most of its carbon dioxide having come out of solution so that the drink no longer fizzes or contains any bubbles.

  9. Flat as an adjective (wine):

    Lacking acidity without being sweet.

  10. Flat as an adjective (of a battery):

    Unable to emit power; dead.

  11. Flat as an adjective (juggling, of a throw):

    Without spin; spinless.

  12. Flat as an adjective (figurative):

    Lacking liveliness or action; depressed; dull and boring.

    Examples:

    "The market is flat."

    "The dialogue in your screenplay is flat -- you need to make it more exciting."

  13. Flat as an adjective:

    Absolute; downright; peremptory.

    Examples:

    "His claim was in flat contradiction to experimental results."

    "I'm not going to the party and that's flat."

  14. Flat as an adjective (phonetics, dated, of a [[consonant]]):

    sonant; vocal, as distinguished from a sharp (non-sonant) consonant

  15. Flat as an adjective (grammar):

    Not having an inflectional ending or sign, such as a noun used as an adjective, or an adjective as an adverb, without the addition of a formative suffix; or an infinitive without the sign "to".

    Examples:

    "Many flat adverbs, as in 'run fast', 'buy cheap', etc. are from Old English."

  16. Flat as an adjective (golf, of a [[golf club]]):

    Having a head at a very obtuse angle to the shaft.

  17. Flat as an adjective (horticulture, of certain [[fruit]]s):

    Flattening at the ends.

  18. Flat as an adjective (authorship, figuratively, esp. of a character):

    Lacking in depth, substance, or believability; underdeveloped; one-dimensional.

    Examples:

    "ant round"

    "The author created the site to [[flesh out]] the books' flatter characters, who were actually quite well developed in her own mind."

  1. Flat as an adverb:

    So as to be flat.

    Examples:

    "Spread the tablecloth flat over the table."

  2. Flat as an adverb:

    Bluntly.

    Examples:

    "I asked him if he wanted to marry me and he turned me down flat."

  3. Flat as an adverb:

    Not exceeding.

    Examples:

    "He can run a mile in four minutes flat."

  4. Flat as an adverb:

    Completely.

    Examples:

    "I am flat broke this month."

  5. Flat as an adverb:

    Directly; flatly.

  6. Flat as an adverb (finance, slang):

    Without allowance for accrued interest.

  1. Flat as a noun:

    An area of level ground.

  2. Flat as a noun (music):

    A note played a semitone lower than a natural, denoted by the symbol ♭ sign placed after the letter representing the note (e.g., B♭) or in front of the note symbol (e.g. ♭♪).

  3. Flat as a noun (informal, automotive):

    A flat tyre/tire.

  4. Flat as a noun (in the plural):

    A type of ladies' shoes with very low heels.

    Examples:

    "She liked to walk in her flats more than in her high heels."

  5. Flat as a noun (in the plural):

    A type of flat-soled running shoe without spikes.

  6. Flat as a noun (painting):

    A thin, broad brush used in oil and watercolor/watercolour painting.

  7. Flat as a noun (swordfighting):

    The flat part of something: The flat side of a blade, as opposed to the sharp edge. The palm of the hand, with the adjacent part of the fingers.

  8. Flat as a noun:

    A wide, shallow container.

    Examples:

    "a flat of strawberries"

  9. Flat as a noun (mail):

    A large mail piece measuring at least 8 1/2 by 11 inches, such as catalogs, magazines, and unfolded paper enclosed in large envelopes.

  10. Flat as a noun (geometry):

    A subset of n-dimensional space that is congruent to a Euclidean space of lower dimension.

  11. Flat as a noun:

    A flat-bottomed boat, without keel, and of small draught.

  12. Flat as a noun:

    A straw hat, broad-brimmed and low-crowned.

  13. Flat as a noun (rail, US):

    A railroad car without a roof, and whose body is a platform without sides; a platform car or flatcar.

  14. Flat as a noun:

    A platform on a wheel, upon which emblematic designs etc. are carried in processions.

  15. Flat as a noun (mining):

    A horizontal vein or ore deposit auxiliary to a main vein; also, any horizontal portion of a vein not elsewhere horizontal.

    Examples:

    "rfquotek Raymond"

  16. Flat as a noun (obsolete):

    A dull fellow; a simpleton.

  17. Flat as a noun (technical, theatre):

    A rectangular wooden structure covered with masonite, lauan, or muslin that depicts a building or other part of a scene, also called backcloth and backdrop.

  1. Flat as a verb (poker slang):

    To make a flat call; to call without raising.

  2. Flat as a verb (intransitive):

    To become flat or flattened; to sink or fall to an even surface.

    Examples:

    "rfquotek Sir W. Temple"

  3. Flat as a verb (intransitive, music, colloquial):

    To fall from the pitch.

  4. Flat as a verb (transitive, music):

    To depress in tone, as a musical note; especially, to lower in pitch by half a tone.

  5. Flat as a verb (transitive, dated):

    To make flat; to flatten; to level.

  6. Flat as a verb (transitive, dated):

    To render dull, insipid, or spiritless; to depress.

  1. Flat as a noun (chiefly, British, New England, New Zealand, and, Australian, archaic, _, elsewhere):

    An apartment, usually on one level and usually consisting of more than one room.

  1. Planar as an adjective:

    Of or pertaining to a plane.

    Examples:

    "A planar projection of a three-dimensional object is its projection onto a plane."

  2. Planar as an adjective:

    Flat, two-dimensional.

  3. Planar as an adjective (graph theory, of a graph):

    Able to be embedded in the plane with no edges intersecting.

    Examples:

    "A complete graph with more than four nodes is never planar."

  4. Planar as an adjective (transistor chip, semiconductor devices):

    Having a flat profile, not etched into a mesa.

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