juniora.[L. contr. fr. juvenior, compar. of juvenis young. See Juvenile.]()1. Less advanced in age than another; younger. Abbreviated Jr.()()2. Lower in standing or in rank, or having entered later into a position or office; as, a junior partner; junior counsel; junior captain; the junior Senator from New York.()3. Composed of juniors, whether younger or a lower standing; as, the junior class; the junior baseball league; of or pertaining to juniors or to a junior class. See Junior, n., 2.()4. Belonging to a younger person, or an earlier time of life.()Our first studies and junior endeavors. (Sir T. Browne.)5. of or relating to the third year of a four-year term; -- used of the third or next to final year in a U. S. high school or college. See junior{2}, n..()n.1. A younger person.()His junior she, by thirty years. (Byron.)2. One of a lower or later standing; specifically, in American colleges and four-year high schools, one in the third year of his course, one in the fourth or final year being designated a senior; in some seminaries, one in the first year, in others, one in the second year, of a three years' course.()