Definition - The adding of affixes to a word or a stem.

Example -
When you add the suffix -ly to the word quickly, you are agglutinating.

Etymology -
The word derives from the Latin agglutinationem, fasten with glue (from ad, to + glutinare, to glue).

Oxford English Dictionary -
Its first citation is from 1830:
"The Platt-Deutsch was a compact language like the English, not admitting much agglutination."
(Coleridge, Table Talk, May 7)

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