Coupler has 2 different meanings across 1 category:
Noun
Noun
1
a mechanical device that serves to connect the ends of adjacent objects
"The train conductor checked each coupler to ensure the cars were securely linked before departure."
2
Someone who couples things together, especially someone whose job it is to couple railway carriages.
"The train conductor shouted for the coupler to connect the last carriage before they departed from the station."
Broader Terms (hypernyms)
Narrower Terms (hyponyms)