What is the meaning of Semi?

A semi-detached house.

A semi-trailer; a tractor-trailer; an eighteen-wheeler; an artic.

A semifinal.

A partial erection of the penis.

A semiautomatic firearm.

to sow

mid, mediocre, not bad, not good

sort of, kind of, pretty

partial tumescence, semi-erection

shoot, sprout

sprouting

plural of seme

Rōmaji transcription of せみ

Rōmaji transcription of セミ

Alternative form of semen (to sort out)

third-person active present subjunctive of semja

masculine plural of semo

first-person singular present/imperative active of seti (to sleep)

semifinal, semi-final

plural of usemi

Clipping of semifinal.

Source: wiktionary.org