bastion /ˈbæsti.ən/noun 4verb 1forms 3 noun4 •A projecting part of a rampart or other fortification.[…] Fort Camosun had swelled herself from being a little Hudson's Bay Fort, inside a stockade with bastions at the corners, into being the little town of Victoria, and the capital of British Columbia. — 1942 •A well-fortified position; a stronghold or citadel. •(figurative) A person, group, or thing, that strongly defends some principle. •Any large prominence; something that resembles a bastion in size and form.[…] yonder cloud That rises upward always higher, And onward drags a labouring breast, And topples round the dreary west, A looming bastion fringed with fire. — 1850 verb1 •To furnish with a bastion. formsbastioned · bastioning · bastions