A type of cam (and camshaft) in an internal combustion engine, and thus also (metonymic) the type of valvetrain design, the type of engine that uses it, or an instance of such an engine; this design has the inlet and exhaust valves in the cylinder head and has the camshaft(s) up above the valves too.

overhead cranenoun

A crane used in industry with a steel bridge mounted on a runway at either end, and a hoist which travels along the bridge.

overhead kicknoun

A kick where the ball travels over the player's head.

overhead linenoun

A wire or cable, suspended between poles or by a catenary, used to provide trains, trams or trolley buses with electricity.

overhead projectornoun

A projector that projects an image over the heads of the viewers onto a screen in front of them.

overhead valvenoun

A type of valve in an internal combustion engine, and thus also (metonymic) the type of valvetrain design, the type of engine that uses it, or an instance of such an engine; this design has the inlet and exhaust valves in the cylinder head (and therefore above the piston). The camshaft can be beside the pistons (with pushrods and rockers operating the valves) or above the valves, with the latter usually referred to as overhead cam.

overheadmannoun

A high-ranking headman; a chief over other headmen.

overheadyadj

Excessively heady.

overhealverb

To heal over.

overhealingnoun

The production of excessive tissue during the healing of a wound

overheapverb

To heap too high; heap up excessively; supply too much of.

overhearverb

To hear something that was not meant for one's ears.

overheardverb

simple past and past participle of overhear

overhearernoun

One who overhears.

overhearingnoun

The act by which something is overheard.

overheartyadj

Excessively hearty.

overheatverb

To heat excessively.

overheatedadj

Excessively heated.

overheatedlyadv

In an overheated manner; with undue heat.

overheatednessnoun

The quality of being overheated.

overheaternoun

An individual who tends to feel too hot.

overheatingnoun

A situation where something is overheated.

overheaveverb

To overcast.

overheavilyadv

Too heavily.

overheavinessnoun

Excessive heaviness.

overheavyadj

Excessively heavy.

overheightadj

Higher than is standard or (transport, law, of a vehicle) higher than is allowed.

overheightenverb

To heighten excessively.

overheightenedadj

Overly heightened in intensity and/or concentration.

overhelpverb

To supply with too much help.

overhelpfuladj

Excessively helpful.

overhemisectverb

To divide beyond the midline

overhemisectedverb

simple past and past participle of overhemisect

overhendverb

To overtake.

overhentverb

To catch hold of; to overtake.

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 257. 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.