All 4 Uses

colleague
in
The Kitchen Boy
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The upshot was that, in twenty years, only four students had persevered to the end and obtained a degree under Dr. Mansour's supervision and the young doctor to whose fate it fell to have Dr. Mansour as an advisor would receive the heartfelt condolences of his colleagues, as though someone dear to him had died.†

colleagues = fellow workers -- especially in a respected profession such as teaching, medicine, or law
His mother, however—to his amazement—attributed all his problems to his colleagues' envy of his superiority and took to pestering him every evening to pass seven times over a brazier for which she brought incense from the tomb of Lady Sugar Lump (a well-known saint with a shrine on el-Azhar Street).†
Hisham knew that they were lying and started asking his colleagues in the other departments.†
*
His colleagues and professors made a big fuss over congratulating Hisham but when the time came for him to be appointed, the university administration announced that there were no empty posts.†

Definitions:

(1) (colleague)
fellow worker -- especially in a respected profession such as teaching, medicine, or law
(2) (meaning too rare to warrant focus)