English Words: O
15,494 words · Page 139 of 310
An opera, or genre of opera, characterised by spoken dialogue interspersed between the arias and ensemble numbers.
A type of blueback trout, Salvelinus oquassa, specifically those found in the Rangeley Lakes Region of Maine. Now considered to be the same species as the Sunapee trout.
Connects at least two alternative words, phrases, clauses, sentences, etc., each of which could make a passage true.
Used to indicate one's intention to do everything possible to achieve a goal, with failure being the only alternative.
Unless one can provide the proof that one is requesting, that person has no credibility in the matter.
Said by someone after a statement, meaning to precede a pun or another kind of clever rephrasing
Or something like that. Used to indicate the possibility that the preceding word or phrase is vague or not exactly correct in its applicability.
Or something else; allows for the existence of an unexpressed alternative to what was said.
used to indicate a paraphrase or the chance of an error in the details of reported speech.
The serrated junction between the retina and the ciliary body, marking the transition from the simple non-photosensitive area of the ciliary body to the complex, multilayered photosensitive region of the cilia.
The set of incised ancient Chinese characters found on oracle bones used in divination during Bronze Age China.
In computability theory, a form of theoretical Turing machine, able to solve even undecidable decision problems in a single operation.
The quality of being efficacious when taken by mouth (usually of a medicinal drug).
In Freudian psychology, the satisfaction felt in infancy when the need for food, especially from the mother's breast, is fulfilled, and which in later life can be associated with such dysfunctional behaviors as excessive eating, drinking, or smoking.
The act or an act of oralising; the act or an act of turning something written into something oral.
Spelling & Dictionary Insight
The English alphabetical index for the letter O contains 15,494 headwords drawn from our Wiktionary-derived dictionary table. At 50 entries per page the browse splits into 310 pages, and you are currently viewing page 139. Every row above is a dictionary-backed entry with a canonical slug, and each links through to a full definition page with pronunciation, senses, etymology, and related-word data where available.
On this page 50 of 50 entries carry a part-of-speech tag and 50 carry at least one stored definition. Coverage varies across letters because Wiktionary volunteers build entries at different speeds for different parts of the alphabet, letters with common starting sounds (S, C, T, P) usually have the densest coverage, while less frequent starters (X, Q, Z) tend to have shorter but more specialised lists. PlainSpell surfaces whatever data is present and links back to the source when a definition is not yet recorded.
For readers using this index as a spelling reference, the guarantee is that every form you see on the list is a documented English headword, not a guess, not a derived inflection lacking a lemma row. If a word you expected to find is absent from the "O" list, it usually means the form exists only as an inflection of another lemma (e.g. a past participle stored under the infinitive) or the entry has not yet been imported from Wiktionary. Use the search bar or the misspelling lookup to resolve these cases.