Idioms for back

Origin of back

1
before 1000; Middle English bak, Old English bæc back of the body; cognate with Old Frisian bek, Old Saxon, Old Norse bak; perhaps < Indo-European *bhogo- bending; cf. bacon

OTHER WORDS FROM back

back·less, adjective

WORDS THAT MAY BE CONFUSED WITH back

back up backup

synonym study for back

31. Back, hind, posterior, rear refer to something situated behind something else. Back means the opposite of front: back window. Hind, and the more formal word posterior, suggest the rearmost of two or more often similar objects: hind legs; posterior lobe. Rear is used of buildings, conveyances, etc., and in military language it is the opposite of fore: rear end of a truck; rear echelon.

usage note for back

55. Although some object to their use, the phrases in back of and the shorter—and much older— back of with the meaning “behind” are fully established as standard in American English: The car was parked ( in ) back of the house. Both phrases occur in all types of speech and writing.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for back up (1 of 3)

back up

verb (adverb)

noun backup

British Dictionary definitions for back up (2 of 3)

Word Origin for back

Old English bæc; related to Old Norse bak, Old Frisian bek, Old High German bah

British Dictionary definitions for back up (3 of 3)

back2
/ (bæk) /

noun

a large tub or vat, esp one used by brewers

Word Origin for back

C17: from Dutch bak tub, cistern, from Old French bac, from Vulgar Latin bacca (unattested) vessel for liquids
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for back up

back
[ băk ]

n.

The posterior portion of the trunk of the human body between the neck and the pelvis; the dorsum.
The backbone or spine.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Idioms and Phrases with back up (1 of 2)

back up

1

Move or drive a vehicle backward, as in He told her to back up into the garage. [First half of 1800s]

2

Bring or come to a standstill, as in The water had backed up in the drains, or The accident had backed up traffic for miles. [First half of 1800s]

3

Support or strengthen, as in The photos were backed up with heavy cardboard so they couldn't be bent, or I'll back up that statement of yours. [Second half of 1700s]

4

Duplicate a file or program so that the original is not lost. For example, Every computer manual warns you to back up your work frequently in case of a power outage or computer failure. [Second half of 1900s]

Idioms and Phrases with back up (2 of 2)

back

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.