Synonyms:
rift
Meaning: a gap between cloud masses; "the sun shone through a rift in the clouds"
Usage examples
Surprised at the rift of light which he saw under his door, he had risen from his bed, and had groped his way thither.
But the very first day there came a rift in their happiness in the shape of the new professor of chemistry, a man about Julia Cloud's age, whom Ellen Robinson had met on her visit to Thayerville, and told about her sister.