Assembling

to bring together or gather into one place, company, body, or whole.
to put or fit together; put together the parts of:
to assemble information for a report; to assemble a toy from a kit.
Computers. (def 4).
to come together; gather; meet:
We assembled in the auditorium.
Contemporary Examples

assembling a nice private data set is a huge amount of work.
Why Don’t More Social Scientists Share Their Data? Megan McArdle April 17, 2013

Now, Stimpson spends an average of two to three hours assembling each photograph in a tiny, dark room of his West Midlands home.
Classic Photography in Lego Isabel Wilkinson August 26, 2009

Think of assembling your knives as putting together a good home-entertainment center.
The Perfect Use for Deadly Weapons Chad Ward July 20, 2009

A model of modernity, Happerton struggles to create himself, assembling an identity wholecloth.
Must Read Fiction: ‘Prague Fatale,’ ‘Derby Day’ and More Malcolm Forbes, Hillary Kelly, Mythili Rao May 8, 2012

At the same time, other agents were assembling a profile of Dykes.
Alabama Hostage Standoff: Jimmy Lee Dykes Seized Boy to Gain Attention Michael Daly February 5, 2013

Historical Examples

Or from what necessity did the son of Atreus, assembling an army, lead it hither?
The Iliad of Homer (1873) Homer

The assembling of the crew of a merchantman, in that day, was a melancholy sight.
Ned Myers James Fenimore Cooper

They were charged with assembling in troops in the counties of Warwick and Worcester, breaking into stables and seizing horses.
What Gunpowder Plot Was Samuel Rawson Gardiner

As they were assembling for breakfast on this morning, Arthur came in.
The Channings Mrs. Henry Wood

Outside the engine-house, people carrying lanterns were assembling, swearing, and shouting for the keys.
Skipper Worse Alexander Lange Kielland

verb
to come or bring together; collect or congregate
to fit or join together (the parts of something, such as a machine): to assemble the parts of a kit
to run (a computer program) that converts a set of symbolic data, usually in the form of specific single-step instructions, into machine language
noun
(ballet) a sideways leap in which the feet come together in the air in preparation for landing
v.

earlly 14c., transitive and intransitive, from Old French assembler “come together, join, unite; gather” (11c.), from Latin assimulare “to make like, liken, compare; copy, imitate; feign, pretend,” later “to gather together,” from ad- “to” (see ad-) + simulare “to make like” (see simulation). In Middle English and in Old French it also was a euphemism for “to couple sexually.” Meaning “to put parts together” in manufacturing is from 1852. Related: Assembled; assembling. Assemble together is redundant.