Standard Lemma guide

vacuous

adj · 6 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.

  • /ˈvækju.əs/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • CMU ARPABET: V AE1 K Y UW0 AH0 S Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Empty; void; lacking meaningful content.

Definition source: English Wiktionary via Wiktextract

Examples

  • vacuous expression
  • vacuous remark
  • The movie was criticized for its vacuous dialogue.
  • She gave him a vacuous smile.

Meaning relationships

Synonyms: empty, vacant, empty as a pauper's purse, empty as the tomb on Easter, clean, leer, toom, unfilled, vacuumlike, vacuous, void

Antonyms: none provided

2

adj

Meaning 2

Showing a lack of thought or intelligence; vacant.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: empty-headed, brainless, addlebrained, addlepated, airheaded, bee-brained, beef-witted, beefheaded, beetle-headed, birdbrained, blockheaded, Boeotian, boneheaded, boofheaded, braindead, bubbleheaded, buffle-headed, bullet-headed, cerebrally challenged, childish, chowderheaded, chuckleheaded, crackbrained, cretinous, daft, dense, dented, dim-bulb, dim-headed, dim-witted, dim, doltish, dopey, dozy, drowsy, dull-headed, dull-minded, dull-witted, dull, dumber than a box of rocks, dumb, dunderheaded, fatheaded, feeble-minded, flea-brained, foolish, fuzzy-headed, fuzzy-minded, goofy, half-brained, half-witted, hammer-headed, idiotic, ignorant, imbecilic, inane, insipid, intellectually challenged, knuckleheaded, lamebrained, lowbrow, lumpish, lunkheaded, mentally challenged, mentally retarded, mindless, monosynaptic, moronic, muttonheaded, nitwitted, numbskulled, oafish, obtuse, peabrained, pratty, pudding-headed, puerile, purblind, quarter-witted, retarded, ridiculous, rockheaded, sharp as a bowling ball, sheep-headed, silly, simple, slow, slow on the uptake, slow-witted, smooth-brained, stolid, stupid, thick-skulled, thickheaded, thickwitted, thick, unapprehensive, unclever, uninformed, unintelligent, unsmart, vacant, vacuous, witless, wooden-headed, wool-headed, woolly-headed, woolly-minded, dumb as a bag of hammers, dumb as a box of rocks, dumb as a doorknob, dumb as an ox, dumb as a post, dumb as a sack of hammers, dumb as dirt, dumber than a rock, not the sharpest crayon in the box, not the sharpest knife in the drawer, not the sharpest tool in the shed, thick as a brick, thick as a plank, thick as champ, thick as mince, thick as two short planks, thick as a whale omelette, ass-brained, fuckwitted, shit-for-brains, thick as pig shit

Antonyms: none provided

3

adjective satellite

Meaning 3

void of expression

Definition source: Princeton WordNet 3.0

Examples

  • a blank stare

Meaning relationships

Synonyms: blank

Antonyms: none provided

4

adjective satellite

Meaning 4

devoid of matter

Definition source: Princeton WordNet 3.0

Examples

  • a vacuous space

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

adjective satellite

Meaning 5

devoid of significance or point

Definition source: Princeton WordNet 3.0

Examples

  • empty promises
  • a hollow victory
  • vacuous comments

Meaning relationships

Synonyms: empty, hollow

Antonyms: none provided

6

adjective satellite

Meaning 6

devoid of intelligence

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: asinine, fatuous, inane, mindless

Antonyms: none provided

History

Etymology

Learned borrowing from Latin vacuus (“empty, vacant”) + -ous.

Across languages

Translations

33 source translations are retained for this English entry.

  • Arabic: فَارِغ (fāriḡ) — lacking meaningful content
  • Bulgarian: празен (prazen) — lacking meaningful content
  • Catalan: vacu — lacking meaningful content
  • Dutch: nietszeggend — lacking meaningful content
  • Finnish: merkityksetön — lacking meaningful content
  • Finnish: ontto — lacking meaningful content
  • Finnish: tyhjä — lacking meaningful content
  • French: niais — lacking meaningful content
  • Georgian: ცარიელი (carieli) — lacking meaningful content
  • Georgian: უაზრო (uazro) — lacking meaningful content
  • Georgian: უგუნური (ugunuri) — lacking meaningful content
  • German: leer — lacking meaningful content
  • German: nichtssagend — lacking meaningful content
  • Hungarian: üres — lacking meaningful content
  • Polish: próżny — lacking meaningful content
  • Polish: pusty — lacking meaningful content
  • Portuguese: vazio — lacking meaningful content
  • Russian: пусто́й (pustój) — lacking meaningful content
  • Russian: пустопорожний (pustoporožnij) — lacking meaningful content
  • Russian: бессмы́сленный (bessmýslennyj) — lacking meaningful content
  • Scottish Gaelic: faoin — lacking meaningful content
  • Serbo-Croatian: isprazan — lacking meaningful content
  • Spanish: vacuo — lacking meaningful content
  • Swedish: tom — lacking meaningful content
  • Swedish: andefattig — lacking meaningful content
  • Welsh: gwag — lacking meaningful content
  • Bulgarian: безмислен (bezmislen) — showing a lack of thought
  • French: niais — showing a lack of thought
  • German: gedankenlos — showing a lack of thought
  • Polish: bezmyślny — showing a lack of thought
  • Polish: tępy — showing a lack of thought
  • Scottish Gaelic: faoin — showing a lack of thought
  • Welsh: penwan — showing a lack of thought