define

v. t. [ imp. & p. p. Defined p. pr. & vb. n. Defining. ] [ OE. definer, usually, to end, to finish, F. définir to define, L. definire to limit, define; de- + finire to limit, end, finis boundary, limit, end. See Final, Finish. ] 1. To fix the bounds of; to bring to a termination; to end. “To define controversies.” Barrow. [ 1913 Webster ]

2. To determine or clearly exhibit the boundaries of; to mark the limits of; as, to define the extent of a kingdom or country. [ 1913 Webster ]

3. To determine with precision; to mark out with distinctness; to ascertain or exhibit clearly; as, the defining power of an optical instrument. [ 1913 Webster ]

Rings . . . very distinct and well defined. Sir I. Newton. [ 1913 Webster ]

4. 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. [ 1913 Webster ]

They define virtue to be life ordered according to nature. Robynson (More's Utopia). [ 1913 Webster ]