Lumbar

//ˈlʌm.bɑɹ// adj, noun, slang

adj, noun, slang ·Moderate ·College level

Definitions

Noun

1
The lumbar region. informal
2
A lumbar vertebra.
"The first lumbar moved between the erect position and extreme flexion 8.2 cm."

Adjective

1
Related to the lower back or loin, specifically the five vertebrae between the rib cage and the pelvis.
"The lumbar spine supports the upper body and transmits the weight of the upper body to the pelvis and lower limbs."

Adjective

1
of or relating to or near the part of the back between the ribs and the hipbones wordnet

Synonyms

dorsal low back lower back lumbal small of the back

Example

"This chair has good lumbar support."

Etymology

From Latin lumbāris, from lumbus (“loin”) + -āris. See loin.

Related phrases

lumbar ganglion lumbar puncture lumbar vertebra lower back

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.