[verb uh-glom-uh-reyt; adjective, noun uh-glom-er-it, -uh-reyt]

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.

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

Synonyms for agglomerate

Antonyms for agglomerate Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for agglomerate

lump, cluster, mass, collection, aggregate, pile

Examples from the Web for agglomerate

Historical Examples of 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