I. o ‧ ver ‧ dose 1 /ˈəʊvədəʊs $ ˈoʊvərdoʊs/ BrE AmE noun [countable]
1 . too much of a drug taken at one time
overdose of
a massive overdose of heroin
She took an overdose and died two days later.
2 . too much of something, especially something harmful
overdose of
an overdose of sun
II. o ‧ ver ‧ dose 2 /ˌəʊvəˈdəʊs $ ˌoʊvərˈdoʊs/ BrE AmE verb [intransitive]
( abbreviation OD ) to take too much of a drug at one time, so that it harms you or kills you
overdose on
She overdosed on sleeping pills.