From Longman Dictionary of Contemporary Englishhen partyˈhen ˌparty noun [countable] British English informalSSWPARTY a party for women only, that happens just before one of them gets married → stag party
Examples from the Corpus
hen party• They'd had a hen party on the strength of Muriel's coming wedding.• No point in inviting a rooster to a hen party, especially if he has a valid point to make. 