
1) Big rig 2) Half 3) Hauler 4) Rig 5) Semifinal 6) Semitrailer 7) Tractor-trailer 8) Truck
Found on
https://www.crosswordclues.com/clue/semi

1) US Open match 2) An 18-wheeler 3) Annual opener 4) Artery traveler 5) Automatic introduction 6) Automatic lead-in 7) Automatic opener 8) Automatic opening 9) Automatic start 10) Automatic starter 11) Before final 12) Before the final 13) Big hauler 14) Big long-distance carrier 15) Big Mack 16) Big match
Found on
https://www.crosswordclues.com/clue/semi

Semi- is a Latin prefix to a verb, noun, or adjective meaning `half`. Some compounds formed with it are often abbreviated to simply `semi` in appropriate contexts: ...
Found on
http://en.wikipedia.org/wiki/Semi

<prefix> A prefix signifying half, and sometimes partly or imperfectly; as, semiannual, half yearly; semitransparent, imperfectly transparent. ... The prefix semi is joined to another word either with the hyphen or without it. In this book the hyphen is omitted except before a capital letter; as, semiacid, semiaquatic, semi-Arian, semiaxis, s...
Found on
http://www.encyclo.co.uk/local/20973

Semi is American slang for a large truck or lorry (an articulated lorry).
Found on
http://www.probertencyclopaedia.com/browse/ZS.HTM

Colloquialism used in reference to semi-finished steel, i.e. ingot, bloom, billet or slab
Found on
https://www.steelonthenet.com/files/glossary-5.html
No exact match found.