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Definitions

jack

[jak] / dʒæk /
NOUN
sailor
Synonyms
STRONG
bluejacket boater cadet diver jack-tar lascar marine mariner mate middy navigator pilot pirate salt seafarer seaman shipmate swab tar tarpaulin windjammer
WEAK
able-bodied sailor circumnavigator deck hand hearty midshipman/woman old salt sea dog sea person shellback swabber swabbie water dog yachter
VERB
raise
Synonyms
STRONGEST
hoist shove
STRONG
boost construct elevate erect establish exalt heave hike jump lever lift mount promote pry rear up upcast upheave uplift upraise
WEAK
bring up hold up lift up move up place up pull up put on its end put up run up set up set upright stand up take up throw up uprear
Antonyms
STRONG
condemn decline decrease demote denounce depress destroy drop fall hurt lower raze ruin

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.

Core inflation came in hotter than expected this week, and higher oil prices are almost certainly going to jack up headline numbers.

From Barron's • Mar. 13, 2026

To solve the problem, they created a square-shaped device that could plug into a smartphone’s headphone jack and read credit cards.

From The Wall Street Journal • Mar. 3, 2026

New jack swing made stars of Sweat, Al B. Sure!,

From Los Angeles Times • Feb. 18, 2026

The conglomerates lure subscribers with low introductory prices, only to jack them up once a customer is inside their walled gardens.

From MarketWatch • Dec. 12, 2025

“We don’t know jack about the stupid Creators.”

From "The Maze Runner" by James Dashner

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.