semi: /se'mee/ or /se'mi:/ 1. n. Abbreviation for `semicolon',
when speaking. "Commands to grind are prefixed by semi-semi-star"
means that the prefix is `;;*', not 1/4 of a star. 2. A prefix used
with words such as `immediately' as a qualifier. "When is the
system coming up?" "Semi-immediately." (That is, maybe not for an
hour.) "We did consider that possibility semi-seriously." See also
infinite.