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Definitions

sill

[sil] / sɪl /
NOUN
beam
Synonyms
STRONGEST
girder joist piling pillar plank pole shaft timber
STRONG
axle balk bolster boom brace cantilever column crossbar crosspiece jamb lintel pile post prop rafter scantling spar stanchion stay stringer strip strut stud two-by-four
NOUN
ledge
Synonyms
STRONGEST
berm ridge rim
STRONG
bar bench bracket console edge jut mantle offset path projection reef route step strip tier track trail walk way
NOUN
projection
Synonyms
STRONG
bump bunch eaves extension hook jut knob ledge outthrust point prolongation prominence protrusion protuberance ridge rim shelf spine spur step swelling
Antonyms
STRONG
depression
NOUN
rafter
Synonyms
STRONGEST
beam
STRONG
axle balk bolster boom brace cantilever column crossbar crosspiece girder jamb joist lintel pile piling pillar plank pole post prop scantling shaft spar stanchion stay stringer strip strut stud timber two-by-four
NOUN
threshold
Synonyms
STRONGEST
brink verge
STRONG
dawn door doorstep doorway edge entrance gate inception origin outset point start vestibule
WEAK
point of departure starting point
Antonyms
STRONGEST
middle
STRONG
completion conclusion death disadvantage end ending finish

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The California Energy Commission, which tracks fuel inventory, said the state’s current jet fuel stock is sill sufficient.

From Los Angeles Times • Apr. 24, 2026

Video footage from inside their Riverside home showed water levels reaching just below the window sill, after the the Six Mile Water River burst its banks.

From BBC • Jan. 27, 2026

The Red Sea was initially connected from the north to the Mediterranean through a shallow sill.

From Science Daily • Oct. 8, 2025

“It’s the law,” the not-unkind super replies — though Alex, now 2, can barely sit up, let alone reach the sill.

From New York Times • Apr. 23, 2024

All you had to do was swing your leg over the sill and step down onto the grass.

From "Tradition" by Brendan Kiely

Vocabulary lists containing sill

Earth Science - Middle School

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Earth Science - High School

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Rocks and Minerals - Middle School and High School

Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!