Vacuous
adjective /ˈvækjuəs/ — Lacking thought, ideas, or substance; empty.
Definition
Having or showing a lack of thought or intelligence; devoid of serious content or meaning.
Beyond the definition
Vacuous is the word for empty in the specific sense of showing no evidence of inner life. A vacuous smile. A vacuous comment. It's not quite stupid — it's more the impression of nothing going on behind the surface.
Origin & history
From Latin vacuus (empty, free), from vacare (to be empty). The same root gives us vacuum — literal emptiness — and vacation — time that is empty of work.
Example sentences
Illustrative sentences for learning, not verified community posts or sourced quotations.
The interview was vacuous — six minutes of warm observations that said nothing.
She was tired of vacuous content masquerading as commentary.
His expression was so vacuous that she couldn't tell if he'd understood a word.
How to use it
This entry uses an adjective. Follow the examples for the nouns it describes and its position in the sentence.
Choose “Vacuous” when the meaning fits your context: Having or showing a lack of thought or intelligence; devoid of serious content or meaning.
Synonyms
empty, inane, mindless, vapid, hollow
Antonyms
thoughtful, substantive, profound, intelligent
Related words
- vapid
- hollow
- inane
- trite
Vacuous vs vapid
Vapid describes something without liveliness or interest — flat, insipid, dull. Vacuous goes further: it implies a complete absence of thought or substance, as if there is nothing at all behind the surface. A vapid conversation is boring; a vacuous one shows no evidence of any inner life. Vapid is a gentler criticism; vacuous implies a kind of hollow emptiness that is almost surprising in its completeness.
Word in the Wild
See how this word appears in life, language and stories.
Illustrative sentences and imagined stories for learning — not verified sightings, interviews, or sourced quotations.
Fictional scene
Minimalist Room With Vast Window
An adult sits alone in a room with minimal furniture and a large, open view outside.
The starkness of the minimal, bare room represents a state of being devoid of content. Much like the empty space, a vacuous interaction or perspective lacks depth or serious substance, leaving an impression of quiet, unintentional emptiness in place of complexity.
Image credit: Wordspun · AI-generated conceptual illustration
Questions about this word
What does "Vacuous" mean?
Vacuous is adjective meaning: Lacking thought, ideas, or substance; empty.. Having or showing a lack of thought or intelligence; devoid of serious content or meaning.
Where does the word "Vacuous" come from?
From Latin vacuus (empty, free), from vacare (to be empty). The same root gives us vacuum — literal emptiness — and vacation — time that is empty of work.