[ klot ]
See synonyms for: clotclottedclotting on

  1. a mass or lump.

  2. a semisolid mass, as of coagulated blood.

  1. a small compact group of individuals: a clot of sightseers massed at the entrance.

  2. British Informal. blockhead, dolt, clod.

verb (used without object),clot·ted, clot·ting.
  1. to form into clots; coagulate.

verb (used with object),clot·ted, clot·ting.
  1. to cause to clot.

  2. to cover with clots: Carefully aimed snowballs clotted the house.

  1. to cause to become blocked or obscured: to clot the book's narrative with too many characters.

Origin of clot

before 1000; Middle English; Old English clott lump; cognate with Middle Dutch klotte,German Klotz block, log (cf. klutz)

Other words from clot

  • de·clot, verb, de·clot·ted, de·clot·ting.
  • non·clot·ting, adjective
  • un·clot·ted, adjective

Words Nearby clot Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use clot in a sentence

British Dictionary definitions for clot


/ (klɒt) /

  1. a soft thick lump or mass: a clot of blood

  2. British informal a stupid person; fool

verbclots, clotting or clotted
  1. to form or cause to form into a soft thick lump or lumps

Origin of clot

Old English clott, of Germanic origin; compare Middle Dutch klotte block, lump

Derived forms of clot

  • clottish, adjective

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

Scientific definitions for clot


[ klŏt ]

  1. A soft insoluble mass formed when blood or lymph gels. During blood clotting, white blood cells, red blood cells, platelets, and various clotting factors interact in a cascade of chemical reactions initiated by a wound. When a body tissue is injured, calcium ions and platelets act on prothrombin to produce the enzyme thrombin. Thrombin then catalyzes the conversion of the protein fibrinogen into fibrin, a fibrous protein that holds the clot together. An abnormal clot inside the blood vessels or the heart (a thrombus or an embolus) can obstruct blood flow.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.