Thesaurus.com
Dictionary.com
Definitions

back up

VERB
move backward
Synonyms
STRONGEST
fall back retreat
WEAK
abandon withdraw
Antonyms
STRONGEST
forge ahead
WEAK
continue defend pursue
VERB
support
Synonyms
WEAK
advance back champion confirm encourage help lend support promote pull for stand behind stand by
Antonyms
WEAK
continue defend pursue
ADJECTIVE
substitute
Synonyms
STRONG
alternate alternative another stand-in

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.

If you tunnel your way north, through the long-shuttered rows of dead underground storefronts, you can pop back up to ground level at Fletcher Bowron Square.

From Los Angeles Times • Apr. 11, 2026

Loyola Marymount University law professor Jessica Levinson said that with key endorsements, such as labor, now back up for grabs, anyone can jump to the front of the pack.

From Los Angeles Times • Apr. 11, 2026

I can't see him re-climbing the ranks and building himself back up.

From BBC • Apr. 9, 2026

Shares of Constellation Brands have bounced this year, amid hopes that beer drinking will pick back up.

From The Wall Street Journal • Apr. 9, 2026

Hannie had put the blackout screen back up when we went back to bed, so I took it down, opened the window and looked out.

From "Code Name Kingfisher" by Liz Kessler