Practice is a pattern/a customary way of operation or behavior.

http://wordnetweb.princeton.edu/perl/webwn?s=practice&sub=Search+WordNet&o2=&o0=1&o8=1&o1=1&o7=&o5=&o9=&o6=&o3=&o4=&h=

Best practice -> a working method or set of working methods that is officially accepted as being the best to use in a particular business or industry, usually described formally and in detail

https://dictionary.cambridge.org/dictionary/english/best-practice

A method or technique that has consistently shown results superior to those achieved with other means, and that is used as a benchmark. See also best in class and leading practice.

Read more: http://www.businessdictionary.com/definition/best-practice.html

"The manner in which work is performed, which is less formal than a methodology, is not required, and is typically based on preferences or recommended conventions or approaches." PMI (2017)

Practices  are defined as routinized activities, concepts, routines, tools, or processes that provide structure for everyday doings and activities in organizations. (Kohtamäki et al. 2018, p.10)