English Reference
adjective

countless

adj.
US /ˈkaʊntɫəs/ UK /kˈaʊntləs/ count·less

  1. 01 B2 Upper Intermediate

    describing a very large number of things, people, or times.

    innumerable or too many to be counted; often used for emphasis to describe a vast quantity.

    Simple

    I have told him countless times to lock the door when he leaves.

    In context

    The scientist spent countless hours in the laboratory, meticulously documenting every minor variation in the chemical reaction over several months.

    fewlimitedcountable

Some also questioned , external what the implications could be for game developers, given the feature would also seemingly train Amazon's AI models on the countless video games being played by streamers.

BBC News· 13 Aug 2026

It was a moving atmosphere, immortalised by the countless phones raised to capture photos and videos of that precise instant.

The Local· 13 Aug 2026

From count + -less.

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

This entry
Level C1 · Advanced
Frequency Frequent
Updated