OD'd or ODed; OD'ing; OD's
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
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
Cite this Entry
“Od.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/od. Accessed 31 Oct. 2025.
Copy CitationKids Definition
OD
1 of 2 noun
: an overdose of a drug and especially a narcotic
OD
2 of 2 verb
OD'd or ODed
(ˈ)ō-ˈdēd
; OD'ing
(ˈ)ō-ˈdē-iŋ
: to become ill or die from an OD
Medical Definition
od
1 of 4 abbreviation
every day
—used in writing prescriptions
OD
2 of 4 noun1
: an overdose of a narcotic
2
: an individual who has taken an OD
OD
3 of 4 intransitive verb
OD'd or ODed; OD'ing; OD's
: to become ill or die of an OD
OD
4 of 4 abbreviation1
doctor of optometry
2
[Latin oculus dexter]
right eye
—used in writing prescriptions
Etymology
Abbreviation
Latin omnes dies
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