noun

1. A young male.

   “Kate is dating a boy named Jim.”

2. (diminutive) A male child: a son of any age.

3. (diminutive) A male of any age, particularly one rather younger than the speaker.

Synonyms: chap, guy, lad, mate, brat, knave, squirt, manservant

verb

1. To use the word “boy” to refer to someone.

   “Don't boy me!”

2. To act as a boy (in allusion to the former practice of boys acting women's parts on the stage).

interjection

1. Exclamation of surprise, pleasure or longing.

   “Boy, I wish I could go to Canada!”