tender offer noun1 •A type of public takeover bid in which a prospective acquirer invites all stockholders of a publicly traded corporation to tender their stock for sale at a specified price during a specified time, subject to the tendering of a minimum and maximum number of shares.The potential deal — where OpenAI would sell existing company shares in a so-called tender offer — could total $300 million, depending on how many employees agree to sell their stock, they said. — 2023 formstender offers