semi noun
plural semis
plural semis
Learner's definition of SEMI
[count] informal
2
/ˈsɛˌmaɪ/ US : a short, heavy truck that has a long trailer attached to the back and that is used to move goods : semitrailer半拖卡车;半拖车 3
/ˈsɛmi/ British : a house that is attached to another house : a semidetached house半独立式住宅