Meaning of UNDERLAY in English

UNDERLAY

I. transitive verb (underlaid; -laying) Date: before 12th century to cover, line, or traverse the bottom of ; give support to on the underside or below, to raise or support by something laid under, II. noun Date: 14th century something that is or is designed to be laid under

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.