fellow

n. a way to refer to a man or boy. You might use this to be polite, slightly old-fashioned, or friendly.

n. a male person; used as a synonym for 'man', 'guy', or 'chap'. Often carries a slightly formal or old-fashioned tone depending on the region.

“He seems like a very kind young fellow who is always willing to help.”

“The elderly fellow at the corner shop has been a fixture of this neighbourhood for over forty years.”

Informal

adj. used to describe people who are in the same situation as you or share your job.

adj. denoting a person in the same position, involved in the same activity, or otherwise associated with the speaker or subject.

“She wanted to discuss the new rules with her fellow students after class.”

“The lead researcher urged his fellow scientists to remain objective despite the surprising preliminary results of the clinical trial.”

n. a member of a university or a group of learned people who do research together.

n. a member of a learned society or a senior member of a college or university, often involved in research or teaching.

“She was elected as a fellow of the Royal Society for her work in physics.”

“After completing his doctorate, he was invited to stay on as a research fellow to continue his investigation into renewable energy.”

Academic · Formal

n. a person who is your companion or someone who is equal to you in rank.

n. a companion, comrade, or peer; one who belongs to the same class or group as another.

“He felt a deep connection to his fellows who had survived the long journey.”

“The poet wrote extensively about the shared struggles of his fellows during the industrial revolution.”

Literary

n. one of a pair of things that match or go together.

n. one of a pair of matching or complementary objects; a counterpart.

“I found one glove in the drawer, but I cannot find its fellow anywhere.”

“The antique vase was missing its fellow, which had reportedly been lost during the family's move across the Atlantic.”

Archaic