bright sunshine; broad daylight
Often used in the phrase 白日のもとに (in broad daylight, publicly). Can also refer to the bright sun itself.
His misdeeds were exposed in broad daylight.
When seen in bright sunshine, the painting looked faded.
daydream; waking dream; fantasy
clear weather; blue sky and bright sun · cleared of charges; proven innocent; clear conscience
Compound of 白 (white, bright) and 日 (sun, day). The exact historical derivation is uncertain, but the combination naturally conveys the idea of bright daylight.