blue o'clock

Fetched 2026-10-26 (cache).

Datamuse reports no synonyms or antonyms for this word.

Noun

1. {{lb|en|colloquial}} A time very [[early]] in the morning, just before dawn. {{defdate|from 19th c.}}

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