- 1to take too much of a drug at one time, so that it is dangerous He had overdosed on heroin.
- 2(figurative) I had overdosed on sun.
NAmE//ˈoʊvərˌdoʊs//(informal OD) [intransitive] overdose (on something)Verb Forms present simple I / you / we / they overdose
he / she / it overdoses
past simple overdosed
-ing form overdosing