clot

1 of 2

noun

ˈklät 

1

: a portion of a substance adhering together in a thick nondescript mass (as of clay or gum)

2

a

: a roundish viscous lump formed by coagulation of a portion of liquid or by melting

b

: a coagulated mass produced by clotting of blood

3

British : blockhead

4

: cluster, group

a clot of spectators

clot

2 of 2

verb

clotted; clotting

intransitive verb

1

: to become a clot : form clots

2

: to undergo a sequence of complex chemical and physical reactions that results in conversion of fluid blood into a coagulated mass : coagulate

transitive verb

1

: to cause to form into or as if into a clot

2

: to fill with clots

also : clog

clotted streets

Synonyms of clot

Noun

• cluster
• batch
• collection
• array
• clump
• bunch
• constellation
• group
• lot
• assemblage
• grouping
• battery

Verb

• block
• obstruct
• jam
• occlude
• clog

Examples of clot in a Sentence

Noun

We were told that his stroke was caused by a clot in his brain.

a clot of daisies occupied one corner of the flower bed

Verb

medications that prevent blood from clotting

substances that help to clot blood

Recent Examples on the Web

Noun

The biggest concerns are severe peripheral artery disease (PAD), poor circulation and current or suspected deep vein thrombosis, since compression can further restrict blood flow or dislodge a clot. — Samantha Agate, Sacbee.com, 14 Sep. 2026

People with severe peripheral artery disease or a current or suspected deep vein thrombosis should avoid them because compression can restrict blood flow or dislodge a clot. — Samantha Agate, Fort Worth Star-Telegram, 14 Sep. 2026

Verb

Somehow my body had depleted my blood supply and ability to clot. — Natasha Dye, PEOPLE, 18 Sep. 2026

At the other side of the woods the land dips into a ravine, the great trees end and dense bushes clot the bank. — Literary Hub, 24 Aug. 2026

Word History

Etymology

Noun

Middle English, from Old English clott; akin to Middle High German klōz lump, ball — more at clout

First Known Use

Noun

before the 12th century, in the meaning defined at sense 1

Verb

1530, in the meaning defined at intransitive sense 1

Phrases Containing clot

• blood clot
• clot-buster

Rhymes for clot

• aught
• baht
• blot
• bott
• bought
• brought
• caught
• cot
• cott
• dot
• fought
• fraught

Kids Definition

clot

1 of 2 noun

ˈklät 

: a mass or lump made by a liquid (as blood) that thickens and sticks together

clot

2 of 2 verb

clotted; clotting

: to become or cause to become a clot : form clots

Medical Definition

clot

1 of 2 noun

ˈklät 

: a coagulated mass produced by clotting of blood

clot

2 of 2 verb

clotted; clotting

intransitive verb

: to undergo a sequence of complex chemical and physical reactions that results in conversion of fluid blood into a coagulum and that involves shedding of blood, release of thromboplastin from blood platelets and injured tissues, inactivation of heparin by thromboplastin permitting calcium ions of the plasma to convert prothrombin to thrombin, interaction of thrombin with fibrinogen to form an insoluble fibrin network in which blood cells and plasma are trapped, and contraction of the network to squeeze out excess fluid : coagulate

transitive verb

: to cause to form into or as if into a clot