halfpenny \half"pen*ny\, half-penny \half"-pen*ny\(h[=a]"p[e^]n*n[y^] or h[aum]f"-; 277), n.;pl. {Half-pence} (-pens) or {Half-pennies}(-p[e^]n*n[i^]z). An English coin of the value of half a penny, no longer minted; also, the value of half a penny. Syn: ha'penny. [1913 Webster + WordNet 1.5]