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Definition of bolster

bolster

/ˈboʊl.stɚ/
bol · ster

Plural:bolsters
•
Past Simple:bolstered
•
Past Participle:bolstered
•
Present Participle:bolstering
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bolster Lexical Profile

bolster Game Scores & Validity

• verb

1

To support, strengthen, or prop up (an idea, argument, organization, or morale).

Example

"The encouraging economic data helped to bolster investor confidence."


2

To provide or support with a pillow or cushion.

Example

"The nurse helped bolster the patient's injured leg with extra pillows."

Synonyms
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Antonyms
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• noun

1

A long, thick, often cylindrical pillow or cushion placed under other pillows for support on a bed or sofa.

Example

"She placed a firm bolster behind her back while reading in bed."


2

A structural part, timber, or mechanical pad designed to support, reduce friction, or bear weight in a vehicle, bridge, or building.

Example

"The engineer inspected the steel bolster supporting the bridge girder."


3

British A broad-bladed cold chisel used by masons and bricklayers for cutting stone or brick.

Example

"The bricklayer used a heavy club hammer and a bolster to split the paving slab cleanly."

Synonyms
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• Rhymes for bolster

Word Origin & Etymology

From Old English bolster, meaning 'head pillow', derived from the Proto-Germanic root *bulstraz, which is related to the verb 'bulge' and refers to something stuffed or swollen.

Cite this Entry


Wordmom. (2026). Definition of Bolster. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/bolster
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