Definition of Charles's Wain in English:

Charles's Wain

proper noun

Archaic

Origin

Old English Carles wægn ‘the wain of Carl (Charlemagne)’, perhaps because the star Arcturus was associated with King Arthur, with whom Charlemagne was connected in legend.

Pronunciation:

Charles's Wain

/ˌtʃɑːlzɪz ˈweɪn/