[ noun ] an executioner who beheads the condemned person <noun.person>
Headsman \Heads"man\ (h[e^]dz"man), n.; pl. {Headsmen} (-men). An executioner who cuts off heads. --Dryden.
The exhibition includes everything from clocks and jewelry to the embroidered linen overshirt worn by King Charles I as he knelt to the headsman's ax in 1649.