thickening

noun

thick·​en·​ing ˈthi-kə-niŋ 

ˈthik-

1

: a thickened part or place

2

: the act of making or becoming thick

3

: something used to thicken

Examples of thickening in a Sentence

Recent Examples on the Web

The ProGrowth + Peptide range for those with fine or thin hair includes a gently exfoliating mandelic acid shampoo, thickening conditioner, strengthening serum (in a click-pen applicator, shown) and a serum mist that protects hair from heat damage while also plumping up strands. —Jackie Fields, PEOPLE, 15 Dec. 2025

When people are receiving cyclosporine therapy to prevent rejection, magnesium can reduce the thickening of the kidney's vascular walls that the therapy can cause. —Ruth Jessen Hickman, Health, 11 Dec. 2025

Utilizing a Roux For a classic thickening method, prepare a roux. —Katie Rosenhouse, Southern Living, 3 Dec. 2025

Abdominal obesity was associated with thickening of the heart muscle and smaller heart chamber volumes. —Khloe Quill, FOXNews.com, 1 Dec. 2025

Word History

First Known Use

15th century, in the meaning defined at sense 1

Rhymes for thickening

• quickening
• sickening

Kids Definition

thickening

noun

thick·​en·​ing

1

: the act of making or becoming thick

underwent a gradual thickening

2

: a thickened part or place

3

: something used to thicken