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professional (EN)
adjective, noun

adjective “professional”

base form professional (more/most)
  1. showing the skill and experience of someone trained
    His professional performance earned him a standing ovation.
  2. relating to a profession
    Her professional experience impressed her colleagues.
  3. done for payment rather than as a hobby
    She turned her love for photography into a professional career.

noun “professional”

singular professional, plural professionals
  1. a person who is qualified in a profession
    She consulted with a medical professional to discuss her treatment options.
  2. a person who is paid to participate in a sport or activity rather than as an amateur
    After years of playing tennis for fun, she became a professional and joined the tour.
  3. (euphemistic) a prostitute
    He didn't realize she was a professional until she asked for payment.