A sperm cell carrying a Y chromosome results in an XY combination, and typically a boy will develop. Variations from this general rule result in intersex fetuses.

The meaning of BOY is a male child from birth to adulthood. How to use boy in a sentence.

BOY definition: a male child, from birth to full growth, especially one less than 18 years of age. See examples of boy used in a sentence.

1 day ago · The 11-year-old boy, who is accused of shooting and killing his father after he took away his Nintendo Switch, appeared in court for the first time. Clayton Dietz appeared before a judge on ...

Definition of boy noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

uk / bɔɪ / us / bɔɪ / (also oh boy) used to express excitement, worry, disappointment, etc. or to emphasize something:

Apr 22, 2025 · Boy (interjection): An exclamation expressing surprise, excitement, or emphasis, often colloquial. The term "boy" relates to gender, age, and social contexts. It is a foundational word in the …

Feb 12, 2026 · "My dear girl, what has he done?" said Mrs. Mallowe, sweetly. It is noticeable that ladies of a certain age call each other "dear girl," just as commissioners of twenty-eight years' standing …

You can refer to a man as a boy, especially when you are talking about him in an affectionate way.

Used to express mild astonishment, elation, or disgust: Oh boy—what a surprise!