Practice is the act of rehearsing a behavior repeatedly, to help learn and
eventually master a skill. Sessions scheduled for the purpose of rehearsing
and performance improvement are called practices. They are engaged in by
sports teams, bands, individuals, etc., as in, "He went to football practice
every day after school".
In British English, practice is the noun and practise is the verb, but in
American English it is now common for practice to be used both as a noun and
a verb (see American and British English spelling differences; this article
follows American conventions).
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