first light

Definitions

The time of day when light first appears in the sky; dawn.

The moment when a new telescope or other optical instrument is used for the first time to capture an image.

Examples

We set out on our hike at first light to avoid the midday heat.

The mountain peaks were bathed in a soft, golden glow at first light.

Synonyms

dawn daybreak sunrise cockcrow break of day early morning peep of day

Antonyms

dusk sunset nightfall twilight eventide gloaming close of day