Definition of "full-length"
(art) A full-length portrait.
Quotations
Below was a full-length of James II., at whose feet was a sort of throne, on which the duchess was placed.
1837, L[etitia] E[lizabeth] L[andon], “An Interview”, in Ethel Churchill: Or, The Two Brides. […], volume II, London: Henry Colburn, […], page 212