windowsill

noun

win·​dow·​sill ˈwin-dō-ˌsil 

-də-

: the horizontal member at the bottom of a window opening

Examples of windowsill in a Sentence

Recent Examples on the Web

Adding a houseplant or two to your home is an easy way to brighten up a sunny kitchen windowsill or add color and texture to the corners of living rooms and bedrooms. — Lauren Landers, Better Homes & Gardens, 13 Sep. 2026

Outside or a windowsill, herbs such as chives or parsley can thrive with enough sunlight. — Pedro Moura, Los Angeles Times, 1 Sep. 2026

Unlike many plants, these like to be crowded in their pots, so yearly replanting isn’t necessary—just overwinter the whole pot on a windowsill or unheated garage, Montgomery says. — Madeline Buiano, Martha Stewart, 1 Sep. 2026

There was a wall of books and happy houseplants in pots on every windowsill and in every corner. — Carla Lalli, Vogue, 31 Aug. 2026

Word History

First Known Use

1703, in the meaning defined above

Kids Definition

windowsill

noun

win·​dow·​sill -ˌsil 

: the horizontal piece at the bottom of a window