[ verb uh-glom-uh-reyt; adjective, noun uh-glom-er-it, -uh-reyt ]
/ verb əˈglɒm əˌreɪt; adjective, noun əˈglɒm ər ɪt, -əˌreɪt /

verb (used with or without object), ag·glom·er·at·ed, ag·glom·er·at·ing.

to collect or gather into a cluster or mass.


gathered together into a cluster or mass.
Botany. crowded into a dense cluster, but not cohering.


a mass of things clustered together.
rock composed of rounded or angular volcanic fragments.

Nearby words

  1. agger,
  2. aggers,
  3. aggeus,
  4. aggie,
  5. aggiornamento,
  6. agglomeration,
  7. agglutinant,
  8. agglutinate,
  9. agglutination,
  10. agglutination test

Origin of agglomerate

1675–85; < Latin agglomerātus (past participle of agglomerāre), equivalent to ag- ag- + glomer- (stem of glomus ball of yarn) + -ātus -ate1

Related formsag·glom·er·a·tive [uh-glom-uh-rey-tiv, -er-uh-tiv] /əˈglɒm əˌreɪ tɪv, -ər ə tɪv/, adjectiveag·glom·er·a·tor, nounnon·ag·glom·er·a·tive, adjectiveun·ag·glom·er·a·tive, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for agglomerate

British Dictionary definitions for agglomerate


verb (əˈɡlɒməˌreɪt)

to form or be formed into a mass or cluster; collect

noun (əˈɡlɒmərɪt, -ˌreɪt)

a confused mass
a rock consisting of angular fragments of volcanic lavaCompare conglomerate (def. 2)

adjective (əˈɡlɒmərɪt, -ˌreɪt)

formed into a mass
Derived Formsagglomeration, nounagglomerative, adjective

Word Origin for agglomerate

C17: from Latin agglomerāre, from glomerāre to wind into a ball, from glomus ball, mass

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

Word Origin and History for agglomerate



1680s, from Latin agglomeratus, past participle of agglomerare "to wind or add onto a ball," from ad- "to" (see ad-) + glomerare "wind up in a ball," from glomus (genitive glomeris) "ball of yarn," from PIE root *glem-. Related: Agglomerated; agglomerating.

Online Etymology Dictionary, © 2010 Douglas Harper