<p><strong>Noun</strong></p><ul><li>a robbery or holdup: Four men were involved in the armored car heist.</li></ul><p><strong>Verb</strong></p><ul><li>(used with object) to take unlawfully, especially in a robbery or holdup; steal: to heist a million dollars' worth of jewels.</li><li>to rob or hold up.</li></ul>