Available Definitions:
1) n. - The act of imitating.
2) n. - That which is made or produced as a copy; that which is made to resemble something else, whether for laudable or for fraudulent purposes; likeness; resemblance.
3) n. - One of the principal means of securing unity and consistency in polyphonic composition; the repetition of essentially the same melodic theme, phrase, or motive, on different degrees of pitch, by one or more of the other parts of voises. Cf. Canon.
4) n. - The act of condition of imitating another species of animal, or a plant, or unanimate object. See Imitate , v. t., 3.