- a man who is the lover of a girl or young woman
"if I''d known he was her boyfriend I wouldn''t have asked"

- a boy or man
"that chap is your host"
"there''s a fellow at the door"
"he''s a likable cuss"

- a person who is member of your class or profession
"the surgeon consulted his colleagues"
"he sent e-mail to his fellow hackers"

- a person who is frequently in the company of another
"drinking companions"
"comrades in arms"

- an informal form of address for a man
"Say, fellow, what are you doing?"
"Hey buster, what''s up?"

1. A companion; a comrade; an associate; a partner; a sharer.

"The fellows of his crime." -- Milton.

"We are fellows still, Serving alike in sorrow." -- Shak.

"That enormous engine was flanked by two fellows almost of equal magnitude." -- Gibbon.

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Commonly used of men, but sometimes of women. Judges xi. 37.

2. A man without good breeding or worth; an ignoble or mean man.

"Worth makes the man, and want of it, the fellow." -- Pope.

3. An equal in power, rank, character, etc.

"It is impossible that ever Rome Should breed thy fellow." -- Shak.

4. One of a pair, or of two things used together or suited to each other; a mate; the male.

"When they be but heifers of one year, . . . they are let go to the fellow and breed." -- Holland.

"This was my glove; here is the fellow of it." -- Shak.

5. A person; an individual.

"She seemed to be a good sort of fellow." -- Dickens.

6. In the English universities, a scholar who is appointed to a foundation called a fellowship, which gives a title to certain perquisites and privileges.

7. In an American college or university, a member of the corporation which manages its business interests; also, a graduate appointed to a fellowship, who receives the income of the foundation.

8. A member of a literary or scientific society; as, a Fellow of the Royal Society.

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Fellow is often used in compound words, or adjectively, signifying associate, companion, or sometimes equal. Usually, such compounds or phrases are self- explanatory; as, fellow-citizen, or fellow citizen; fellow-student, or fellow student; fellow- workman, or fellow workman; fellow-mortal, or fellow mortal; fellow-sufferer; bedfellow; playfellow; workfellow.

"Were the great duke himself here, and would lift up My head to fellow pomp amongst his nobles." -- Ford.

1. To suit with; to pair with; to match. [Obs.] Shak.