Definition - The continuing of a unit of information beyond a single line.

1. Its opposite — where the unit of information fits on a single line — is called end-stopping.

Example -

(1) Enjambed
Tomorrow, and tomorrow, and tomorrow
Creeps in this petty pace from day to day.

(2) Not enjambed
A glooming peace this morning with it brings.
The sun for sorrow will not show his head.

Etymology -
The word derives from the French enjambement, straddling or bestriding

Oxford English Dictionary -
The term's first citation is from 1837–9:
"Du Bartas almost affects the enjambement or continuation of the sense beyond the couplet."
(Hallam Hist. Lit. II. v. ii. §54. 216 )

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