undersill

adj, noun — 2 senses

undersill

adj

Etymology From under- + sill.

1

Beneath a sill.

  • A vinyl undersill trim or finish trim should be used under windowsills to receive the cut edges of the siding.1975, Robert Scharff, The complete book of home remodeling, page 292:

undersill

noun

Etymology From under- + sill.

1

A sill placed underneath something.

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.