odd

UK: /ˈɒd/ US: /ɑd/ ,(od)

Inflections of 'odd' (adj):

odder

adj comparative

oddest

adj superlative

WordReference Random House Learner's Dictionary of American English © 2026

odd /ɑd/   adj., -er, -est. 

1. differing in nature from what is usual or expected:
   an odd choice for ambassador.
2. peculiar, weird, bizarre, or strange:
   odd taste in clothing.
3. Mathematics leaving a remainder when divided by 2, as a number:
   3, 15, and 181 are odd numbers.
4. more or less, esp. a little more than:
   [after a number] I owe the dentist three hundred-odd dollars.
5. being part of a pair, set, or series of which the rest is lacking:
   [before a noun] an odd glove.
6. remaining after all others are paired, grouped, or divided into equal numbers or parts:
   [before a noun] Who gets the odd hamburger?
7. of various or different types or sorts:
   [before a noun] odd bits of information.
8. not regular or full-time;
   occasional:
   [before a noun] did odd jobs.

WordReference Random House Unabridged Dictionary of American English © 2026

odd  (od), adj., -er, -est, n. 
adj. 

1. differing in nature from what is ordinary, usual, or expected:
   an odd choice.
2. singular or peculiar in a strange or eccentric way:
   an odd person; odd manners.
3. fantastic;
   bizarre:
   Her taste in clothing was rather odd.
4. Mathematics leaving a remainder of 1 when divided by 2, as a number (opposed to even):
   Numbers like 3, 15, and 181 are odd numbers.
5. more or less, esp. a little more (used in combination with a round number):
   I owe three hundred-odd dollars.
6. being a small amount in addition to what is counted or specified:
   I have five gross and a few odd dozens.
7. being part of a pair, set, or series of which the rest is lacking:
   an odd glove.
8. remaining after all others are paired, grouped, or divided into equal numbers or parts:
   Everybody gets two hamburgers and I get the odd one.
9. left over after all others are used, consumed, etc.
10. (of a pair) not matching:
    Do you know you're wearing an odd pair of socks?
11. not forming part of any particular group, set, or class:
    to pick up odd bits of information.
12. not regular, usual, or full-time;
    occasional;
    casual:
    odd jobs.
13. out-of-the-way;
    secluded:
    a tour to the odd parts of the Far East.
14. Mathematics (of a function) having a sign that changes when the sign of each independent variable is changed at the same time.

n. 
15. something that is odd.
16. [Golf.]
    • Sport a stroke more than the opponent has played.
    • Sport [Brit.] a stroke taken from a player's total score for a hole in order to give him or her odds.
• Old Norse oddi odd (number)
• Middle English odde 1300–50
odd′ly, adv. 
odd′ness, n. 
Synonyms
• 1. extraordinary, unusual, rare, uncommon. See strange. 
Antonyms
• 1. ordinary, usual, common.

Collins Concise English Dictionary © HarperCollins Publishers::

odd / ɒd/ adjective

1. unusual or peculiar in appearance, character, etc
2. occasional, incidental, or random: odd jobs
3. leftover or additional: odd bits of wool
4. not divisible by two
5. represented or indicated by a number that is not divisible by two: graphs are on odd pages
   Compare even17
6. being part of a matched pair or set when the other or others are missing: an odd sock, odd volumes
7. (in combination) used to designate an indefinite quantity more than the quantity specified in round numbers: fifty-odd pounds
8. out-of-the-way or secluded: odd corners
9. odd man out ⇒ a person or thing excluded from others forming a group, unit, etc

noun

1. one stroke more than the score of one's opponent
2. an advantage or handicap of one stroke added to or taken away from a player's score
3. a thing or person that is odd in sequence or number

Etymology: 14th Century odde, from Old Norse oddi point, angle, triangle, third or odd number. Compare Old Norse oddr point, spot, place; Old English ord point, beginning

ˈoddly adverb

ˈoddness noun

WordReference Random House Learner's Dictionary of American English © 2026

OD /ˈoʊˈdi/   n., pl. ODs or OD's, v., OD'd or ODed, OD'•ing. 
n. [countable]

1. Drugs an overdose of a drug, esp. a fatal one.
2. Drugs a person who has become seriously ill or has died from a drug overdose.

v. [no object]

3. Drugs to take a drug overdose.
4. Drugs to die from a drug overdose.
5. to have or take too much of something:
   I was OD'ing on caffeine.

Collins Concise English Dictionary © HarperCollins Publishers::

OD / ˌəʊˈdiː/ noun

1. an overdose of a drug

verb (OD's, OD'ing, OD'd)

1. (intransitive) to take an overdose of a drug

Etymology: 20th Century: from o(ver)d(ose)

OD abbreviation

1. Officer of the Day
2. Also: o.d. olive drab
3. Also: O/D on demand
4. overdrawn
5. ordnance datum
6. outside diameter