tightlock

Fetched 2026-10-26 (cache).

Datamuse reports no synonyms or antonyms for this word.

Noun

1. {{lb|en|often|attributive}} A form of [[Janney coupler]], typically used on North American mainline passenger rail cars, having [[mechanical]] [[feature]]s that reduce [[slack]] in normal operation and prevent [[telescoping]] in [[derailment]]s, yet remain compatible with other Janney types.

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.