Standard Lemma guide

valency

noun · 9 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • General-American, Received-Pronunciation: vā'lənsē
  • General-American, Received-Pronunciation: /ˈveɪ.lən.si/
  • Southern-England: Recorded audio is listed in the source snapshot.

1

noun

Meaning 1

Alternative form of valence (“the combining capacity of an atom, functional group, or radical determined by the number of atoms of hydrogen with which it will unite, or the number of electrons that it will gain, lose, or share when it combines with other atoms, etc.”).

Definition source: English Wiktionary via Wiktextract

Usage: Britain, alt-of, alternative, countable

Topics: chemistry, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

Alternative form of valence (“the combining capacity of an atom, functional group, or radical determined by the number of atoms of hydrogen with which it will unite, or the number of electrons that it will gain, lose, or share when it combines with other atoms, etc.”).

The capacity of something to combine with other things, as for example the capability of a vaccine as measured by the number of pathogen serotypes that it can counteract.

Definition source: English Wiktionary via Wiktextract

Usage: Britain, broadly, uncountable

Topics: chemistry, natural-sciences, physical-sciences

Examples

  • vaccine valency

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

The number of edges connected to a vertex in a graph.

Definition source: English Wiktionary via Wiktextract

Usage: Britain, countable

Topics: graph-theory, mathematics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: degree

Antonyms: none provided

4

noun

Meaning 4

Alternative form of valence (“the number of arguments that a verb can have, including its subject, ranging from zero to three or, less commonly, four”).

Definition source: English Wiktionary via Wiktextract

Usage: Britain, alt-of, alternative, countable

Topics: human-sciences, linguistics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

noun

Meaning 5

Importance, significance.

Definition source: English Wiktionary via Wiktextract

Usage: Britain, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

noun

Meaning 6

Alternative form of valence.

Definition source: English Wiktionary via Wiktextract

Usage: Britain, alt-of, alternative, countable, uncountable

Topics: algebraic-geometry, geometry, mathematics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

7

noun

Meaning 7

(chemistry) a property of atoms or radicals; their combining power given in terms of the number of hydrogen atoms (or the equivalent)

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: valence

Antonyms: none provided

Broader terms: power, powerfulness

Narrower terms: covalence, covalency

8

noun

Meaning 8

(biology) a relative capacity to unite or react or interact as with antigens or a biological substrate

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: valence

Antonyms: none provided

Broader terms: power, powerfulness

9

noun

Meaning 9

the phenomenon of forming chemical bonds

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: chemical phenomenon

History

Etymology

From Late Latin valentia and Latin valentia (“bodily strength; health; vigour”) + English -y (suffix forming abstract nouns denoting a condition, quality, or state). Valentia is derived from valēns (“healthy, strong, vigorous”) + -ia (suffix forming feminine abstract nouns); while valēns is the present active participle of valeō (“to be healthy, sound, or well; to be strong; to have influence or power, etc.”), ultimately from Proto-Indo-European *h2welh1- (“to rule; powerful, strong”). Sense 1 (“combining capacity of an atom”) and sense 3 (“number of arguments a verb can have”) are possibly from valence + -y.

Across languages

Translations

2 source translations are retained for this English entry.

  • Finnish: yhdisteltävyys — capacity of something to combine with other things
  • Polish: walencja — capacity of something to combine with other things