Top definition
When a telescope or astronomical instrument is first used to take an image after construction.
I just started to build a 100 meter optical telescope in my backyard: first light will be in 2038.
by LegitSciNtech August 18, 2011
Get the mug
Get a First Light mug for your daughter Beatrix.
2
The first lighting of the sky after night and before dawn when the stars begin to dim. Surfers first check the waves at this time.
Hey dude, I'll meet you at Cardiff at first light to shred the gnar-gnar.
by NatureGirlENC May 26, 2018
Get the mug
Get a First Light mug for your cat Trump.
buy the domain for your recipe site