impossible

The definition of impossible is something that cannot be done, that cannot be true, or it also is something or someone who is hard to deal with.

(adjective)

Walking to the moon is an example of something that would be described as impossible.
Someone who is really demanding, and who is never pleased no matter what, is an example of someone who would be described as impossible.

See impossible in Webster's New World College Dictionary

adjective

not capable of being, being done, or happening
not capable of being done easily or conveniently
not capable of being endured, used, agreed to, etc. because disagreeable or unsuitable: an impossible task, an impossible request

Origin: OFr < L impossibilis: see in- & possible

Related Forms:

See impossible in American Heritage Dictionary 4

adjective

Incapable of having existence or of occurring.
Not capable of being accomplished: an impossible goal.
Unacceptable; intolerable: impossible behavior.
Extremely difficult to deal with or tolerate: an impossible child; an impossible situation.

Origin:

Origin: Middle English

Origin: , from Old French

Origin: , from Latin impossibilis

Origin: : in-, not; see in-¹

Origin: + possibilis, possible; see possible

Related Forms: