1630s, "one who enters, a beginner" (of professions, etc.); from French entrant, present participle of entrer (see enter). From 1838 with reference to one who enters a contest. As an adjective from 1630s.
a well publicized entrant is the pocket computer
new entrants to the country must go though immigration procedures
entourage
entrails
entrain
entrammel
entrance
entrant
entrap
entrapment
entre-
entre nous
entreat