noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   Initialism of tunnel boring machine. abbreviation, alt-of, initialism

   "Four other TBMs are currently in the ground, digging twin bore tunnels under the Chilterns and in Greater London."

Synonyms

All synonyms

tunnel boring machine

Example

More examples

"Four other TBMs are currently in the ground, digging twin bore tunnels under the Chilterns and in Greater London."

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.