The difference between Negative and Undesirable

Negative as an adjective:

Not positive or neutral.

Negative as an adjective (physics):

Of electrical charge of an electron and related particles

Negative as an adjective (mathematics):

Of a number: less than zero

Negative as an adjective (linguistics, logic):

Denying a proposition.

Negative as an adjective:

Damaging; undesirable; unfavourable.

Negative as an adjective:

Often used pejoratively: pessimistic; not tending to see the bright side of things.

Negative as an adjective:

Of or relating to a photographic image in which the colours of the original, and the relations of left and right, are reversed.

Negative as an adjective (chemistry):

Metalloidal, nonmetallic; contrasted with positive or basic.

Negative as an adjective ([[New Age]] [[jargon]], pejorative):

Often preceded by , , , or : to be avoided, bad, difficult, disagreeable, painful, potentially damaging, unpleasant, unwanted.

Negative as an adjective:

Characterized by the presence of features which do not support a hypothesis.

Negative as a noun:

Refusal or withholding of assents; prohibition, veto

Negative as a noun (law):

A right of veto.

Negative as a noun (photography):

An image in which dark areas represent light ones, and the converse.

Negative as a noun (grammar):

A word that indicates negation.

Negative as a noun (mathematics):

A negative quantity.

Negative as a noun (weightlifting):

A rep performed with weight in which the muscle begins at maximum contraction and is slowly extended; a movement performed using only the eccentric phase of muscle movement.

Negative as a noun:

The negative plate of a voltaic or electrolytic cell.

Negative as a verb (transitive):

To refuse; to veto.

Negative as a verb (transitive):

To contradict.

Negative as a verb (transitive):

To disprove.

Negative as a verb (transitive):

To make ineffective; to neutralize.

Undesirable as an adjective:

objectionable or not likely to please

Undesirable as a noun:

an undesirable person