English Reference
adjective

seamless

adj.
US /ˈsimɫəs/ UK /sˈiːmləs/ seam·less

  1. 01 B2 Upper Intermediate

    happening in a smooth way without any sudden changes or problems.

    occurring without interruption, gaps, or logical inconsistencies; often used to describe transitions or integrations.

    Simple

    The transition from the old software to the new one was seamless.

    In context

    The director achieved a seamless flow between the flashback sequences and the present-day narrative, ensuring the audience never lost the plot's thread.

  2. 02 B2 Upper Intermediate

    made in one piece without any lines where parts are joined together.

    lacking visible or physical seams; constructed as a single continuous piece of material.

    Simple

    She wore a pair of seamless leggings for her yoga class.

    In context

    The modern skyscraper features a seamless glass facade that reflects the sky without the interruption of bulky metal frames.

    one piecesolid
    seamedstitched

The take-off, down a runway beside the field, is seamless.

BBC News· 1 Sept 2026

From Middle English seemles, semeles, semles, Old English *sēamlēas, equivalent to seam + -less. Cognate with Norwegian Bokmål sømløs (“seamless”), Swedish sömlös (“seamless”).

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

This entry
Origin Old English *sēamlēas
Level B2 · Upper Intermediate
Frequency Frequent
Updated