- semifinal, semi - one of the two competitions in the next to the last round of an elimination tournament
--1 is a kind of match
--1 is a part of elimination tournament - trailer truck, tractor trailer, trucking rig, rig, articulated lorry, semi - a truck consisting of a tractor and trailer together
--2 is a kind of truck, motortruck
--2 has parts: semitrailer, semi; trailer
--2 has particulars: tandem trailer - semitrailer, semi - a trailer having wheels only in the rear; the front is supported by the towing vehicle
--3 is a kind of trailer
--3 is a part oftrailer truck, tractor trailer, trucking rig, rig, articulated lorry, semi