bolster

1 of 2

noun

bol·​ster ˈbōl-stər 

1

: a long pillow or cushion

2

: a structural part designed to eliminate friction or provide support or bearing (see bearing sense 5)

bolster

2 of 2

verb

bolstered; bolstering ˈbōl-st(ə-)riŋ 

transitive verb

1

: to support with or as if with a bolster : reinforce

lay bolstered up in bed

extra men will bolster already augmented dock details

—Stanley Levey

2

: to give a boost to

news that bolstered his spirits

bolsterer

ˈbōl-stər-ər 

noun

Synonyms

Verb

• bear
• brace
• buttress
• carry
• prop (up)
• shore (up)
• stay
• support
• sustain
• undergird
• underpin
• uphold

Examples of bolster in a Sentence

Verb

She came with me to bolster my confidence.

a convincing argument that was bolstered by the speaker's reputation

She is thinking of ways to bolster her career.

Recent Examples on the Web

Noun

Taking a cue from the drapery and matching bolster, Mackin splashed the trim in Farrow & Ball's French Gray (No. 18) to standout against walls painted in Sherwin-Williams' Alabaster. —Cameron Beall, Southern Living, 9 Feb. 2025

Rest your forearms on the ground on each side of the bolster. —Aubrey Bailey, Pt, Dpt, Cht, Verywell Health, 24 Jan. 2025

Verb

While a lower price could be one option, another could be to try to bolster enforcement of the current measure. —Donato Paolo Mancini Bloomberg, arkansasonline.com, 19 Feb. 2025

The two-time All-American was a disruptive force against the pass and run in his three seasons with the Wolverines, and would bolster a front seven that already includes Quinnen Williams, Jermaine Johnson and Will McDonald. —San Diego Union-Tribune, Orlando Sentinel, 19 Feb. 2025

Word History

Etymology

Noun and Verb

Middle English, from Old English; akin to Old English belg bag — more at belly

First Known Use

Noun

before the 12th century, in the meaning defined at sense 1

Verb

1508, in the meaning defined at sense 1

Kids Definition

bolster

1 of 2 noun

bol·​ster ˈbōl-stər 

1

: a long pillow or cushion

2

: a structural part designed to eliminate friction or provide support

bolster

2 of 2 verb

bolstered; bolstering -st(ə-)riŋ 

: to support with or as if with a bolster

also : reinforce

came with me to bolster my spirits

bolsterer

-stər-ər 

noun

Legal Definition

bolster

transitive verb

bol·​ster

ˈbōl-stər

: to use evidence usually improperly to give weight to (evidence already introduced)