(1):
(a.) Younger or inferior in rank; junior; associate; as, a chief justice and three puisne justices of the Court of Common Pleas; the puisne barons of the Court of Exchequer.
(2):
(n.) One who is younger, or of inferior rank; a junior; esp., a judge of inferior rank.
(3):
(a.) Later in age, time, etc.; subsequent.
(4):
(a.) Puny; petty; unskilled.