semi: Meaning and Definition of

sem•i

1. semitrailer (def. 1).
2. Often,semifinal (def. 3).

semi-

1. a combining form borrowed from Latin, meaning “half,” freely prefixed to English words of any origin, now sometimes with the senses “partially,” “incompletely,” “somewhat”: semiautomatic; semidetached; semimonthly; semisophisticated.