Standard Lemma guide

fastness

noun · 11 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.

  • Received-Pronunciation: /ˈfɑːs(t)nəs/
  • Received-Pronunciation: /ˈfæs(t)-/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • General-American: /ˈfæs(t)nəs/
  • /ˈfɑːs(t)nəs/ trap–bath split
  • rhymes with (Received Pronunciation; trap–bath split) -ɑːstnəs
  • rhymes with (General American) -æstnəs
  • CMU ARPABET: F AE1 S T N AH0 S Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

The quality or state of being fast (in various senses).

The quality or state of being strongly attached; firmness, secureness, tenacity.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

The quality or state of being fast (in various senses).

The quality or state of being strongly attached; firmness, secureness, tenacity.

The ability of a dye to withstand fading.

Definition source: English Wiktionary via Wiktextract

Usage: countable, specifically, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

The quality or state of being fast (in various senses).

The quality or state of moving quickly; quickness, rapidity, swiftness.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

The quality or state of being fast (in various senses).

The quality or state of having an extravagant lifestyle or immoral habits.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

noun

Meaning 5

The quality or state of being fast (in various senses).

Of a fortress or other place: the quality or state of being secure from access or attack; safety, security.

Definition source: English Wiktionary via Wiktextract

Usage: archaic, countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

noun

Meaning 6

The quality or state of being fast (in various senses).

The quality or state of being firm, hard, or solid; firmness, hardness, solidity.

Definition source: English Wiktionary via Wiktextract

Usage: countable, obsolete, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

7

noun

Meaning 7

Something that is fast, or that causes someone or something to be fast (in various senses).

A fortified or secure place; a fortress, a stronghold.

Definition source: English Wiktionary via Wiktextract

Usage: also, countable, figuratively, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

8

noun

Meaning 8

Something that is fast, or that causes someone or something to be fast (in various senses).

Something used to fasten or tie; a fastener or fastening.

Definition source: English Wiktionary via Wiktextract

Usage: countable, regional, uncountable

Qualifier: obsolete except UK

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

9

noun

Meaning 9

a strongly fortified defensive structure

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: stronghold

Antonyms: none provided

Broader terms: defensive structure, defense, defence

Narrower terms: bastion, citadel, blockhouse, hold, keep, donjon, dungeon, redoubt

10

noun

Meaning 10

the quality of being fixed in place as by some firm attachment

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: fixedness, fixity, fixture, secureness

Antonyms: none provided

Broader terms: immovability, immovableness

Narrower terms: lodgment, lodgement, lodging

11

noun

Meaning 11

a rate (usually rapid) at which something happens

Definition source: Princeton WordNet 3.0

Examples

  • the project advanced with gratifying speed

Meaning relationships

Synonyms: speed, swiftness

Antonyms: none provided

Broader terms: pace, rate

Narrower terms: haste, hastiness, hurry, hurriedness, precipitation, execution speed, graduality, gradualness

History

Etymology

From Middle English fastnes, fastnesse (“immovableness, stability; firmness, solidness; secure attachment; constancy; obstinacy; something giving firmness or strength; of sleep: soundness; of a wound: healing; assurance, confirmation”) [and other forms], from Old English fæstnes (“fastness, firmness, stability; resolution; tenacity; vigour; firmament; fortification”) [and other forms], from fæst (“firm, stable; constant”) (from Proto-Germanic *fastuz (“firm, fixed; secure”); see further at that entry) + -nes (suffix forming abstract nouns denoting a quality or state). The English word may be analysed as fast + -ness.

Across languages

Translations

18 source translations are retained for this English entry.

  • Turkish: hızlılık — quality or state of being fast (in various senses)
  • Uyghur: تېزلىك (tëzlik) — quality or state of being fast (in various senses)
  • Uyghur: ئىلداملىق (ildamliq) — quality or state of being fast (in various senses)
  • Uyghur: چاپسانلىق (chapsanliq) — quality or state of being fast (in various senses)
  • Uyghur: ئىتتىكلىك (ittiklik) — quality or state of being fast (in various senses)
  • Italian: solidità — ability of a dye to withstand fading
  • Bulgarian: укрепление (ukreplenie) — fortified or secure place — see also fortress, stronghold
  • German: Feste — fortified or secure place — see also fortress, stronghold
  • German: Festung — fortified or secure place — see also fortress, stronghold
  • Old Irish: daingen — fortified or secure place — see also fortress, stronghold
  • Manx: doon — fortified or secure place — see also fortress, stronghold
  • Old English: fæstnes — fortified or secure place — see also fortress, stronghold
  • Russian: цитаде́ль (citadélʹ) — fortified or secure place — see also fortress, stronghold
  • Russian: кре́пость (krépostʹ) — fortified or secure place — see also fortress, stronghold
  • Russian: опло́т (oplót) — fortified or secure place — see also fortress, stronghold
  • Russian: тверды́ня (tverdýnja) — fortified or secure place — see also fortress, stronghold
  • Sanskrit: कलत्र (kalatra) — fortified or secure place — see also fortress, stronghold
  • Scottish Gaelic: daingneach — fortified or secure place — see also fortress, stronghold