Plural of Odds
Cambridge and Oxford treat “odds” as plural in the familiar likelihood and betting senses, and Oxford also uses the plural for obstacles or disadvantages. Use plural agreement such as “the odds are.” The word “odd” has other adjective and noun uses, but it is not normally the singular of probability/betting “odds.”
“Odds” is a plural noun in its ordinary probability, obstacle, and betting senses and normally takes plural agreement: “the odds are …”. “Odd” is not the normal singular counterpart for those meanings.
Key details
Choose the right form
| Meaning / situation | Form / construction | Decision |
|---|---|---|
| likelihood or probability | the odds are / odds of / odds against | Use the plural noun and plural agreement. |
| obstacles or disadvantages | odds | Keep the established plural lexical noun. |
| betting ratio or price | odds | Use the plural betting term; do not create singular “odd” for one quoted ratio. |
Quick tests
Meaning and agreement test
Do you mean probability, obstacles/disadvantages, or a betting ratio?
If yes: Use “odds” and normally use plural agreement.
If no: Analyze “odd” according to its separate adjective or noun sense rather than treating it as the singular of “odds.”
Caveat: This guide covers the general grammar of the plural noun. Idiomatic expressions such as “against all odds” have additional phrase-level meaning beyond the number rule.
Examples
The odds are better after the latest test.
The probability sense takes plural agreement.
They succeeded despite difficult odds.
Here “odds” means obstacles or disadvantages and remains plural.
The bookmaker changed the odds before the event.
The betting sense likewise uses the plural noun “odds.”
Further guidance
Core difference
Use “odds” as a plural noun for likelihood, obstacles/disadvantages, or betting ratios.
Fast Test
If the sentence can naturally use “the odds are …,” keep the plural form and plural agreement.
Usage Boundary
Do not replace “odds” with singular “odd” for these senses. “Odd” has separate meanings, and idioms built with “odds” remain their own phrase-level usage questions.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- ODDS | English meaning - Cambridge Dictionary (opens in a new tab)Cambridge University Press · Current Cambridge treatment labels “odds” a plural noun and uses plural agreement in probability constructions such as “the odds are”, directly supporting the grammar question.
- odds noun - Oxford Advanced Learner's Dictionary (opens in a new tab)Oxford University Press · Current Oxford treatment marks “odds” “[plural]” across likelihood, obstacles and betting senses and records the modern plural construction independently of the adjective “odd”.