first light
The beginning of morning nautical twilight; i.e., when the center of the morning sun is 12 degrees below the horizon.
n
the time when light first appears in the morning; dawn
The beginning of morning nautical twilight; i.e., when the center of the morning sun is 12 degrees below the horizon.
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  first light - the first light of day; "we got up before dawn"; "they talked until morning"aurora, break of day, break of the day, cockcrow, dawn, dawning, daybreak, dayspring, sunrise, sunup, morning time of day, hour - clock time; "the hour is getting late" |
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