English Reference
adjective

nauseous

adj.
US /ˈnɔʃəs/ UK /nˈɔːsɪəs/ nau·seous

  1. 01 B2 Upper Intermediate

    feeling like you are about to vomit or have an upset stomach.

    experiencing a sensation of stomach distress and the urge to vomit.

    Simple

    The smell of the old fish made her feel nauseous immediately.

    In context

    After the turbulent flight, several passengers reported feeling nauseous and requested water from the cabin crew.

    Usage

    In modern usage, this is the most common sense, though some traditionalists prefer 'nauseated' for the feeling and 'nauseous' for the cause.

    Pitfall
    I feel nauseous about the long car ride. I feel nauseous from the long car ride.

    Use 'from' or 'after' to describe the cause of the physical feeling, rather than 'about'.

    sickqueasyunwell
  2. 02 C1 Advanced Formal

    describing something so disgusting or unpleasant that it makes people feel sick.

    inducing a feeling of nausea; sickening or loathsome in nature.

    Simple

    The nauseous smell of the chemicals filled the entire factory floor.

    In context

    The documentary detailed the nauseous conditions of the nineteenth-century slums, shocking the modern audience with its graphic descriptions.

    Teacher's tip

    While this is the original historical meaning, many modern speakers now use 'nauseating' for this sense and reserve 'nauseous' for the feeling of being sick.

Reni said their child felt dizzy and nauseous before developing stomach problems after eating the meal.

BBC News· 3 Sept 2026

From Latin nauseōsus (“causing nausea”), corresponding synchronically to nausea + -ous.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin Latin nauseōsus
Level B2 · Upper Intermediate
Frequency Occasional
Updated