Just

Legally right; conformity with that which is lawful or fair.

Just cause for an action, for example, is a reason for a course of action that is based upon Good Faith.

JUST. This epithet is applied to that which agrees with a given law which is the test of right and wrong. 1 Toull. prel. n. 5 Aust. Jur. 276, n. It is that which accords with the perfect rights of others. Wolff, Inst. Sec. 83; Swinb. part 1, s. 2, n. 5, and part 1, Sec. 4, n. 3. By just is also understood full and perfect, as a just weight Swinb. part 1, s. 3, U. 5.