annexure UK /əˈnɛkʃə/US /əˈnɛkʃɚ/ noun3 •(UK) Something annexed. •(UK, India) An appendix or attachment to a document.This aspect of the publication appears in one of the annexures at the end of the lectures. — 1989 •(UK) The process of annexing.Avulsio is the increase in extent of land bounded by water, through the annexure of land disannexed elsewhere by violent natural causes. — 1986 formsannexures