Verb:
* To imitate the actions, appearance, or mannerisms of someone or something else. This can be done consciously or unconsciously, and can be for entertainment, learning, or other purposes.
* _The child mimicked his father's way of walking._
* _The actor mimicked the president's voice perfectly._
Noun:
* A person who imitates others. This often refers to someone who imitates for entertainment purposes, like a comedian or impersonator.
* _The comedian was a master mimic, able to imitate anyone._
Other:
* In biology, mimicry refers to an evolutionary adaptation where one species evolves to resemble another. This can be for protection from predators or to deceive prey.
* _The viceroy butterfly mimics the monarch butterfly, which is poisonous to predators._
In addition to these core definitions, "mimic" can also be used in a metaphorical sense to describe something that closely resembles or imitates another thing.
To summarize:
* Mimic (verb): to imitate
* Mimic (noun): an imitator
* Mimicry (biology): an evolutionary adaptation where one species resembles another.