I. (ˈ)im, əm+ adjective
Etymology: Middle English, from Middle French & Latin; Middle French, from Latin impossibilis, from in- in- (I) + possibilis possible — more at possible
1.
a. : incapable of being or of occurring : not within the realm of the possible : contrary to the nature of reality
an impossible motion
an impossible creature
b.
(1) : felt to be incapable of being done, attained, or fulfilled : felt to be utterly impracticable
a land impossible of conquest
(2) : extremely and almost insuperably difficult under the circumstances : having little likelihood of accomplishment or completion
spent his time indefatigably doing impossible tasks for the committee
c. of a statement : self-contradictory
2.
a. : out of the question : unacceptable
impossible coloring in a picture
an impossible political candidate
: extremely undesirable
relieving impossible and unfair economic conditions — F.D.Roosevelt
his claret was impossible — Elinor Wylie
: marked by very undesirable qualities
his wife is simply impossible … uses perfumery, and has an awful voice — Margaret Deland
b. : difficult or extremely awkward to deal with or so markedly odd as to be unpleasant or objectionable
a positive genius for collecting impossible people — Ngaio Marsh
an almost impossible man to have for an enemy — Bruce Catton
• im·possibleness “+ noun
II. noun
Etymology: Middle English, from impossible, adjective
: something impossible : impossibility