halve [halvehalveshalvedhalving] BrE [hɑːv] NAmE [hæv] verb 1. intransitive, transitive to reduce by a half; to make sth reduce by a half •The shares have halved in value. •~ sth The company is halving its prices. 2. transitive ~ sth to divide sth into two equal parts see a trouble shared is a trouble halved at ↑troublen. Verb forms: