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From The Collaborative International Dictionary of English v.0.44 [gcide]:
Imaginary \Im*ag"i*na*ry\, adjective [L. imaginarius: cf. F. imaginaire.] Existing only in imagination or fancy; not real; fancied; visionary; ideal.
Wilt thou add to all the griefs I suffer Imaginary ills and fancied tortures? --Addison.
{Imaginary calculus} See under {Calculus}.
{Imaginary expression} or {Imaginary quantity} (Alg.), an algebraic expression which involves the impossible operation of taking the square root of a negative quantity; as, [root]-9, a + b [root]-1.
{Imaginary points}, {lines}, {surfaces}, etc. (Geom.), points, lines, surfaces, etc., imagined to exist, although by reason of certain changes of a figure they have in fact ceased to have a real existence.
Syn: Ideal; fanciful; chimerical; visionary; fancied; unreal; illusive.
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