a. [ L. contr. fr. juvenior, compar. of juvenis young. See Juvenile. ] [ 1913 Webster ]

1. Less advanced in age than another; younger. Abbreviated Jr. [ 1913 Webster +PJC ]

☞ Junior is applied to distinguish the younger of two persons bearing the same name in the same family, and is opposed to senior or elder. Commonly applied to a son who has the same Christian name as his father. [ 1913 Webster ]

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. [ 1913 Webster ]

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. [ 1913 Webster ]

4. Belonging to a younger person, or an earlier time of life. [ 1913 Webster ]

Our first studies and junior endeavors. Sir T. Browne. [ 1913 Webster ]

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..
Syn. -- third-year. [ WordNet 1.5 +PJC ]

n. 1. A younger person. [ 1913 Webster ]

His junior she, by thirty years. Byron. [ 1913 Webster ]

2. Hence: 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. [ 1913 Webster ]

n. The state or quality of being junior. [ 1913 Webster ]

n. [ L. juniperus, prop., youth-producing, and so called from its evergreen appearance, from the roots of E. juvenile, and parent. Cf. Gin the liquor. ] (Bot.) Any evergreen shrub or tree, of the genus Juniperus and order Coniferæ. [ 1913 Webster ]

☞ The common juniper (Juniperus communis) is a shrub of a low, spreading form, having awl-shaped, rigid leaves in whorls of threes, and bearing small purplish blue berries (or galbuli), of a warm, pungent taste, used as diuretic and in flavoring gin. A resin exudes from the bark, which has erroneously been considered identical with sandarach, and is used as pounce. The oil of juniper is acrid, and used for various purposes, as in medicine, for making varnish, etc. The wood of several species is of a reddish color, hard and durable, and is used in cabinetwork under the names of red cedar, Bermuda cedar, etc. [ 1913 Webster ]

Juniper worm (Zool.), the larva of a geometrid moth (Drepanodes varus). It feeds upon the leaves of the juniper, and mimics the small twigs both in form and color, in a remarkable manner. [ 1913 Webster ]

n. (Chem.) A yellow amorphous substance extracted from juniper berries. [ 1913 Webster ]

n. (Paleon.) One of the fossil Coniferæ, evidently allied to the juniper. [ 1913 Webster ]

n. The genus of trees comprising the junipers.
Syn. -- genus Juniperus. [ WordNet 1.5 ]