Topic: OCCUPATIONS
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| Date: | 1800-1900 |
| Origin: | professional |
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pro1
plural pros [countable]
plural pros [countable]1BO someone who is paid to do something, especially play a sport, that other people do for pleasure [= professional; ≠ amateur]: 
a tennis prothe small gap between top amateurs and pros in golf
a tennis prothe small gap between top amateurs and pros in golf2 informal also old pro someone who has had a lot of experience with a particular type of situation : Cathy's an old pro at organizing raffles.
Cathy's an old pro at organizing raffles.4 British English old-fashioned informalBO a prostitute
