A fluoroquinolone antibiotic C₁₈H₂₀FN₃O₄ composed of equal quantities of levofloxacin and dextrofloxacin, that is a broad-spectrum antibacterial agent that is used in topical solution for otic or ophthalmic use or is administered orally or intravenously for other uses.

OFMname

Initialism of Order of Friars Minor or Ordo Fratrum Minorem; the Franciscans, a religious order of mendicant friars.

ofonoun

An Igbo staff of authority.

ofrendanoun

A shrine of offerings to one's ancestors set up on the Day of the Dead.

ofspringnoun

Obsolete spelling of offspring.

Ofstedname

Acronym of Office for Standards in Education, Children's Services and Skills: the non-ministerial government department of His Majesty's Chief Inspector of Schools In England (HMCI).

oftadv

often; frequently; not rarely

oft-repeatedadj

repeated often or frequently

oft-usedadj

Frequently used.

oftenadv

Frequently; many times on different occasions.

often wrong, never in doubtadj

Having overconfidence in one's opinions that is impervious to failure.

ofteneradv

comparative form of often: more often

oftenestadv

superlative form of often: most often

oftenlyadv

often

oftennessnoun

The quality of happening often; frequency.

oftentideadv

Often; frequently.

oftentimeadv

(elsewhere, archaic) Synonym of oftentimes.

oftentimesadv

Frequently; often.

oftenwhilesadv

often; frequently

oftimesadv

(elsewhere, archaic) Alternative form of ofttimes.

oftmentionedadj

Alternative spelling of oft-mentioned.

oftnessnoun

The quality of happening often; frequency.

ofttimesadv

(elsewhere, archaic) Often, frequently.

oftusedadj

Alternative spelling of oft-used.

oftwhilesadv

Often; oftentimes.

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 54. 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.