All 4 Uses

monologue
in
The Women of Brewster Place
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The voice droned on in its practiced monologue, peppered with sterile kindness.†
p. 95.6 *

monologue = a long uninterrupted speech
She looked up and slipped into a practiced monologue.†
p. 115.8
It didn't matter if they often repeated what had been said or if their monologues held no relevance to the issues; each one fought for the space to outshine the other.†
p. 139.4

monologues = long uninterrupted speeches
Laughter and another series of monologues about Betina's bad-natured exit followed for the next five minutes.†
p. 143.7

Definitions:

(1) (monologue)
a long speech by one person, whether it's a dramatic speech in a play, a run-on talk that keeps others from getting a word in, or a comedian's continuous stream of jokes and stories delivered alone

Although less frequently used, "monolog" is also a correct spelling in the United States.
(2) (meaning too rare to warrant focus)