noun
place mat
A mat placed under a plate or cutlery at the table, often decorative. Wasei-eigo from 'luncheon mat'.
wasei-eigo (Japanese-coined English), from luncheon mat
新しいランチョンマットを買って、食卓が明るくなった。
I bought new place mats and the dining table looks brighter.
Explicitly separated spelling; rarely used in practice.
テーブルマット is a more general term for a table mat, while ランチョンマット specifically refers to a place mat used during meals.
Wasei-eigo from English 'luncheon mat', meaning a place mat.