Meaning of PROFESSIONAL in English

PROFESSIONAL

■ adjective

1》 relating to or belonging to a profession.

↘worthy of a ~ person; skilful or competent.

2》 engaged in an activity as a paid occupation rather than as an amateur.

3》 informal, derogatory habitually engaged in a particular activity: a ~ time-waster.

■ noun a ~ person.

↘a person having impressive competence in a particular activity.

Derivatives

~ization or ~isation noun

~ize or ~ise verb

~ly adverb

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.