od
1 of 4interjection
ˈäd 
variants or odd
often capitalized
archaic
—used as a mild oath
OD
2 of 4noun
ˌō-ˈdē
1
: an overdose of a narcotic
2
: one who has taken an OD
OD
3 of 4verb
OD'd or ODed; OD'ing; OD's
intransitive verb
1
: to become ill or die of an OD
2
: to have or experience too much of something —usually used with on
OD on television
OD
4 of 4abbreviation
1
doctor of optometry
2
[Latin oculus dexter] right eye
3
officer of the day
4
olive drab
5
on demand
6
outside diameter; outside dimension
7
overdraft; overdrawn
Word History
Etymology
Interjection
euphemism for God
Noun
overdose
First Known Use
Interjection
1600, in the meaning defined above
Noun
1859, in the meaning defined at sense 1
Verb
1965, in the meaning defined at sense 1
Medical Definition
od 1 of 4
abbreviation
every day —used in writing prescriptions
OD
2 of 4noun
(ˈ)ō-ˈdē
1
: an overdose of a narcotic
2
: an individual who has taken an OD
OD
3 of 4intransitive verb
OD'd or ODed; OD'ing; OD's
: to become ill or die of an OD
OD
4 of 4abbreviation
1
doctor of optometry
2
[Latin oculus dexter] right eye —used in writing prescriptions