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

Use full-fat coconut milk that does not contain additives or thickening agents — Riggs likes Trader Joe’s Organic Coconut Milk or Native Forest Organic Coconut Milk Simple. —CNN Money, 24 Jan. 2026

This causes the uterine lining to stop thickening and to break down, detaching the embryo. —Arthur Jones Ii, ABC News, 14 Jan. 2026

Collins recommends using a strong mousse or thickening tonic to add some grit and definition to fine hair before blow-drying it. —Audrey Noble, InStyle, 13 Jan. 2026

This produces a firm, inorganic-rich SEI that curbs excessive electrolyte loss and uncontrolled SEI thickening. —Chris Young, Interesting Engineering, 6 Jan. 2026

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