Below another in standing or importance
One belonging to a lower class or rank
He was a junior salesman.
Or maybe it goes back to your junior prom.
It's been like that since—God, junior high school—six, seven years!
The undergraduate is called in his first year a junior freshman, in his second a senior freshman, in his third a junior sophister, and in his fourth a senior sophister.
He returned to office as junior lord of the treasury in December.