noun
- a large truck with a trailer; a tractor-trailer
- a semifinal match or competition
Usage: informal
Usage: informal
prefix
- half; partly; partially
Examples
- The semi jackknifed on the icy highway.
- We watched the delivery driver park his semi at the loading dock.
- Our team made it to the semi but lost in overtime.
- She’s nervous about playing in the semi tomorrow.
- The house has a semicircular driveway.
- He lives in a semidetached home.
- The patient was semiconscious after the surgery.