Underlayment

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    Something that is underlaid, such as planking in a room of a house; underlay.
  2. 2
    a pad placed under a carpet wordnet

Etymology

From underlay + -ment.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.