noun.
Partial or near darkness, dimness, twilight.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
partial darkness
Word Usage
"Squatted around in the semidarkness are the russet figures of the merry, primitive spectators, lit up by the flickering glare of the unsteady light, the children usually naked, and the men having frequently bared the upper parts of their bodies."