Definition of prolusion in English:

prolusion

Line breaks: pro|lu¦sion
Pronunciation: /prəˈl(j)uːʒ(ə)n
 
/

noun

archaic or formal
1A preliminary action or event; a prelude.
1.1A preliminary essay or article.

Origin

early 17th century: from Latin prolusio(n-), from prolus- 'practised beforehand', from the verb proludere, from pro 'before' + ludere 'to play'.

Definition of prolusion in:

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Word of the day internecine
Pronunciation: ˌɪntəˈniːsʌɪn
adjective
destructive to both sides in a conflict