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Dictionary.com
Definitions

bulk up

VERB
expand
Synonyms
STRONGEST
bolster broaden develop enlarge grow increase open spread swell widen
STRONG
aggrandize amplify bloat burgeon detail diffuse dilate distend elaborate embellish explicate fatten heighten hike inflate lengthen magnify mount multiply mushroom pad piggyback prolong protract pyramid stretch thicken unfold unfurl unravel unroll wax
WEAK
beef up blow up fan out fill out open out outspread puff up slap on soup up spread out stretch out tack on upsurge
Antonyms
STRONGEST
close compress decrease diminish end halt hide hinder lessen narrow reduce restrict shrink stop
STRONG
abbreviate contract curtail deflate fall lower shorten shrivel simplify tangle thin withhold
WEAK
abridge

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 hiring was seen at the time as a major step by Microsoft to bulk up its AI suite.

From The Wall Street Journal • Mar. 17, 2026

However, an acquisition of Abivax would be more than a way to bulk up European presence, as it presumably would grant Lilly access to the biotech’s product portfolio.

From Barron's • Jan. 12, 2026

A potential deal would bulk up Comcast’s footprint in Europe, where it already owns pay-TV operator Sky, and leave British broadcaster ITV focused on its studios operations.

From The Wall Street Journal • Nov. 7, 2025

Analysts say the company's rich library, stocked with franchises that include Harry Potter, Lord of the Rings and Looney Tunes, makes it attractive for firms looking to bulk up their online streaming catalogues.

From BBC • Oct. 21, 2025

Instead, she had another year, maybe, to bulk up enough to compete against hundreds of others for openings in heavy crew.

From "Ship Breaker" by Paolo Bacigalupi