What does "mimic" mean?

Additional senses

1. 2.(Min.) Imitative; characterized by resemblance to other forms; -- applied to crystals which by twinning resemble simple forms of a higher grade of symmetry. Note: Mimic often implies something droll or ludicrous, and is less dignified than imitative. Mimic beetle (Zoöl.), a beetle that feigns death when disturbed, esp. the species of Hister and allied genera.
2. 3.One who imitates or mimics, especially one who does so for sport; a copyist; a buffoon. Burke.
3. 4.To imitate or ape for sport; to ridicule by imitation. The walk, the words, the gesture, could supply, The habit mimic, and the mien belie. Dryden.
4. 5.(Biol.) To assume a resemblance to (some other organism of a totally different nature, or some surrounding object), as a means of protection or advantage.