defining
verb
Definitions
To determine with precision; to mark out with distinctness; to ascertain or exhibit clearly.
Example: the defining power of an optical instrument
To settle, decide (an argument etc.)
To express the essential nature of something.
Example: I define myself as a techno-anarchist.
To state the meaning of a word, phrase, sign, or symbol.
Example: The textbook defined speed as velocity divided by time.
adjective
Definitions
Serving to define or distinguish.
Example: The ability to reproduce is a defining characteristic of living organisms.