Definition of "targe"

Or burley Hero [Ajax the Great] Sev'nfold Targe who bore, / With Choler furibund, vindictive Steel / Plunging in Brutal Gore; [...]

1730, Andrew Brice, Freedom: A Poem, Written in Time of Recess from the Rapacious Claws of Bailiffs, and Devouring Fangs of Goalers, […], Exon [Exeter, Devon]: […] [T]he author, […], page 80

The Jester wore his usual fantastic habit, but late accidents had led him to adopt a good cutting falchion, instead of his wooden sword, with a targe to match it; [...]

1820, Walter Scott, chapter X, in Ivanhoe; a Romance. […], volume III, Edinburgh: […] Archibald Constable and Co.; London: Hurst, Robinson, and Co. […], page 242

But now the Moormen, stalking o'er the strand / to guard the wat'ery stores the strangers need; / this, targe on arm and assegai in hand, / that, with his bended bow, and venom'd reed[.]

1880, Richard Francis Burton, Os Lusíadas, volume I, page 33

The Bearkillers’ swordmistress danced. Her targe beat aside a spearhead, and then the backsword flicked out in a blurring thrust.

2004, S[tephen] M[ichael] Stirling, Dies the Fire, New York, N.Y.: Roc Books, page 444