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lumbar

American

[luhm-ber, -bahr] / ˈlʌm bər, -bɑr /

adjective

of or relating to the loin or loins.

noun

a lumbar vertebra, artery, or the like.

lumbar British

/ ˈlʌmbə /

adjective

of, near, or relating to the part of the body between the lowest ribs and the hipbones

"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

lumbar Scientific

/ lŭm′bər /

Located at or near the part of the back lying between the lowest ribs and the hips.

Other Word Forms

prelumbar adjective
sublumbar adjective

Etymology

Origin of lumbar

From the New Latin word lumbāris, dating back to 1650–60. See lumb-, -ar ¹

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.

Participants received doses of up to 70mg of zorevunersen through a lumbar puncture.

From Science Daily • Mar. 4, 2026

Lakers guard Gabe Vincent is on the two-game trip, but he was downgraded to out for the game against the Pelicans with a lumbar back strain.

From Los Angeles Times • Jan. 6, 2026

Reports of fitness doubts first appeared in September, with Cummins then ruled out of the white-ball series against New Zealand and India with a lumbar stress fracture.

From BBC • Oct. 26, 2025

Tiger Woods underwent lumbar disc replacement surgery in his lower back after experiencing pain and a lack of mobility, the 15-time major golf champion announced on Saturday.

From Barron's • Oct. 11, 2025

She has posture that suggests lower lumbar pain.

From "Counting by 7s" by Holly Goldberg Sloan

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023