- 1 [intransitive] (of prices, costs, etc.) to fall suddenly synonym plummet Building costs have nosedived. During that period the quality of film-making nosedived.
- 2[intransitive] (of an aircraft) to fall suddenly with the front part pointing toward the ground
NAmE//ˈnoʊzdaɪv//Verb Forms present simple I / you / we / they nosedive
he / she / it nosedives
past simple nosedived
-ing form nosediving