colleague col‧league [ˈkɒliːg ǁ ˈkɑː-] noun [countable]
someone you work with, used especially by professional people or managers:
• a colleague of mine at the bank
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colleague UK US /ˈkɒliːg/ noun [C]
► WORKPLACE a person that you work with: »
He has a good working relationship with colleagues.
Financial and business terms. 2012.