OD

OD

OD¹ [ō′dē′]

Slang

n.

pl. ODs or OD's

an overdose, esp. of a narcotic

vi.

OD'd or ODed, OD'ing or ODing

to take an overdose, esp. a fatal overdose of a narcotic

OD²

abbrev.

1. [L] Doctor of Optometry: also O.D.

2. Officer of the Day

3. olive drab

4. outside diameter: Also, for OD² 3 & 4, od