The American Heritage® Dictionary of the English Language, 4th Edition
n. Informal An allowance for support made under court order and given usually by one person to his or her former lover or live-in companion after they have separated.
n. A form of alimony paid to a former partner in a nonmarital relationship.
the GNU version of the Collaborative International Dictionary of English
n. a form of alimony paid to a former partner in a romantic relationship after a period of living together, even though the two persons involved were not married to each other. The absence of a formal marriage distinguishes it from alimony.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. support paid by one half of an unmarried partnership after the relationship ends
Word Usage
"Several examples came to mind when I read a news report about the recent death of attorney David Kagon, who represented Lee Marvin in the world's first so-called palimony suit."