n.
Pronunciation: ' la-ch ə z, ' l ā -
Function: noun
Inflected Form: plural laches
Etymology: Middle English lachesse, from Anglo-French laschesce, from lasche lax, ultimately from Latin laxare to loosen ― more at LEASE
Date: 14th century
: negligence in the observance of duty or opportunity specifically : undue delay in asserting a legal right or privilege