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

Something for the windowsill in his downstairs toilet, maybe? — Beren Cross, New York Times, 13 Aug. 2026

This set comes with 12 stations to use along doorways, windowsills, countertops, behind appliances, and even on the patio. — Caley Sturgill, Southern Living, 12 Aug. 2026

One employee at Parker Hall placed an all-gender bathroom sign on the windowsill of the women’s bathroom Kirchstein was reported for using. — Cuyler Dunn, Kansas City Star, 10 Aug. 2026

Friendly felines were seen behind screen doors, on windowsills and some people even brought their pets out on a leash for meet-and-greets. — Sara Tenenbaum, CBS News, 9 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