half brother

noun

1. brother ( def 2 ).

half-brother

noun

1. the son of either of one's parents by another partner

Word History and Origins

Origin of half brother¹

Middle English word dating back to 1300–50

Example Sentences

The government also brought to the United States a pair of half brothers — only one of whom, said to be 7, is an American citizen.

From New York Times

At the same time, the Kremlin was courting sympathizers within Chad’s ruling elite, including cabinet ministers and a half brother of the president.

From New York Times

His only loss came last year to Tommy Fury, half brother of WBC heavyweight champ Tyson Fury.

From Seattle Times

Ona also had an older half brother named Austin, but his father’s identity is unknown.

From Literature

Aramco said it had received instructions to dial back expansion from the ministry of energy, which is run by Prince Abdulaziz bin Salman, the older half brother of the crown prince.

From New York Times