half-brother

A form of half brother — A male sibling sharing a single parent, as distinguished from a full brother or brother-german, from a step-brother, or from a brother-like figure such as a blood brother.

Similar
stepbrotherhalf brother
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Meanings

nounhalf-brother (plural half-brothers or half-brethren)

plural half-brothers · plural half-brethren

  1. alternativeAlternative spelling of half brother.

Synonyms & antonyms

nouna brother who has only one parent in common with you

Similar
stepbrotherhalf brother
Broader
brotherblood brother
Also see
half brotherstepbrother

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

Equivalent to half- + brother.

Full word history & related roots →
Cite this entry
APA

half-brother. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/half-brother

MLA

“half-brother.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/half-brother. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “half-brother,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/half-brother.

Source: half-brother on Wiktionary, CC BY-SA 4.0.