English Words: S

54,294 words · Page 412 of 1086

sigma malenoun

A self-reliant and assertive male who occupies a position outside a social or group hierarchy; a lone wolf or maverick.

sigmalikeadj

Characteristic of a structure composed of sigma bonds.

sigmateadj

Shaped like the Greek letter sigma.

sigmaticadj

Having the consonant s added to the root in order to form a tense or case stem.

sigmatismnoun

A lisp.

sigmatropicallyadv

In a sigmatropic manner.

sigmavirusnoun

Any virus of the genus Sigmavirus, affecting dipterans.

SIGMETnoun

A weather advisory concerning the safety of all aircraft.

sigmodontnoun

Any of the Sigmodontinae subfamily of rodents, including New World rats and mice.

sigmodontinenoun

Any rodent of the subfamily Sigmodontinae

sigmoidadj

Semi-circular, like the uncial or lunate sigma (similar to English C).

sigmoid functionnoun

Any of various real functions whose graph resembles an elongated letter "S"; specifically, the logistic function y=(eˣ)/(eˣ+1)=1/(1+e⁻ˣ).

sigmoidaladj

sigmoid; S-shaped.

sigmoidallyadv

In a sigmoidal manner.

sigmoidectomynoun

A colectomy in which the sigmoid colon is removed.

sigmoideumnoun

sigmoid colon

sigmoidicitynoun

The quality of being sigmoid

sigmoidinnoun

Any of a class of flavanones found in Erythrina sigmoidea.

sigmoiditisnoun

inflammation of the sigmoid colon

sigmoidlyadv

Alternative form of sigmoidally.

sigmoidocelenoun

A hernia of the sigmoid colon.

sigmoidopexynoun

surgery to fix the sigmoid colon in place

sigmoidoscopenoun

An instrument used for examining the sigmoid colon.

sigmoidoscopicadj

Relating to the type of examination of the colon.

sigmoidoscopynoun

Internal examination of the sigmoid colon

sigmoidostomynoun

An operation involving the formation of an artificial opening from the sigmoid colon through the abdominal wall.

Sigmundname

Term of address for a person who appears to be dispensing psychoanalysis.

sigmurethrousadj

Of or pertaining to the informal taxonomic group Sigmurethra of molluscs.

signnoun

A visible fact that shows that something exists or may happen.

sign awayverb

To give up something, such as a right or possession, by signing a document

sign inverb

To sign one's name on a list when entering a place, to indicate one's arrival.

sign languagenoun

One of several natural languages, typically used by the deaf, in which words consist of hand shapes, motions, positions, and facial expressions.

sign manualnoun

An authentic signature; (especially), the signature of a sovereign, used to validate a formal document.

sign of lifenoun

An indication that someone is alive; a vital sign.

sign of the crossnoun

A gesture of the hand moving over the front of one's body, or over an object, in the shape of a cross made as part of ritual or to invoke divine protection.

sign of the timesnoun

Something that is symbolic of an era.

sign offverb

To log off; to stop using a computer, radio, etc.; especially, to stop talking.

sign onverb

To join something, after signing.

sign on the dotted lineverb

To formalize an agreement.

sign one's death warrantverb

To make a decision that dooms one to certain death.

sign outverb

To sign one's name as an indication that one is leaving some location; to take some action to indicate one is leaving a secured program or web page on a computer.

sign oververb

To transfer (property or rights) to somebody else by signing a document.

sign upverb

To add a name to the list of people who are participating in something.

signanoun

plural of signum

signabilitynoun

The quality of being signable.

signableadj

That can be signed (represented in sign language).

signagenoun

Signs, particularly those imparting commercial, directional, or road traffic information, taken collectively.

signagesnoun

plural of signage

signalnoun

A sequence of states representing an encoded message in a communication channel.

signal boostnoun

an instance of sharing or disseminating another's information or material with one's own audience

Spelling & Dictionary Insight

The English alphabetical index for the letter S contains 54,294 headwords drawn from our Wiktionary-derived dictionary table. At 50 entries per page the browse splits into 1,086 pages, and you are currently viewing page 412. 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 "S" 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.