n. The act of subsiding from a swollen state, especially the relaxation of an erect penis.
the GNU version of the Collaborative International Dictionary of English
n. Diminution of swelling; subsidence of anything swollen.
The Century Dictionary and Cyclopedia
n. Diminution of swelling: opposed to intumescence.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. diminution of swelling; the subsidence of anything swollen
Word Usage
"In the past, it had always ended with Billy's orgasm, followed by detumescence, a poorly aimed kiss near the ear, a slipping away into stertorous sleep."