l) KEY 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.
Middle English, from Old French, from Latin impossibilis
; see in-1
; see possibleOTHER FORMS:im·possi·bly(Adverb)