tightlock

T1I1G2H4T1L1O1C3K5

noun

A form of Janney coupler, typically used on North American mainline passenger rail cars, having mechanical features that reduce slack in normal operation and prevent telescoping in derailments, yet remain compatible with other Janney types.

Scrabble 19
Ask AI about this wordChatGPTClaudePerplexityGoogle AIGrok

Meanings

nountightlock (plural tightlocks)

plural tightlocks

  1. attributiveoftenA form of Janney coupler, typically used on North American mainline passenger rail cars, having mechanical features that reduce slack in normal operation and prevent telescoping in derailments, yet remain compatible with other Janney types.

Origin

From tight + lock.

Full word history & related roots →
Cite this entry
APA

tightlock. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/tightlock

MLA

“tightlock.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/tightlock. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “tightlock,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/tightlock.

Source: tightlock on Wiktionary, CC BY-SA 4.0.