v. t. - To fix the bounds of; to bring to a termination; to end.
v. t. - To determine or clearly exhibit the boundaries of; to mark the limits of; as, to define the extent of a kingdom or country.
v. t. - To determine with precision; to mark out with distinctness; to ascertain or exhibit clearly; as, the defining power of an optical instrument.
v. t. - To determine the precise signification of; to fix the meaning of; to describe accurately; to explain; to expound or interpret; as, to define a word, a phrase, or a scientific term.
v. i. - To determine; to decide.