- 1 [intransitive] (of a company or a product) to fail completely The company's shares tanked on Wall Street.
- 2 [transitive, intransitive] tank (something) (sport) to lose a game, especially deliberately She was accused of tanking the match. Phrasal Verbstank (something) up
NAmE//tæŋk//Verb Forms present simple I / you / we / they tank
he / she / it tanks
past simple tanked
-ing form tanking