in Latin grammar, part of the conjugation of a verb, being a verbal substantive of the singular number and the fourth declension.

There are two kinds of supines: one, called the first supine, ending in um of the accusative case, which is always of an active signification, and follows a verb of motion; as abit deambulatum. The other, called the last supine, and ending in u of the ablative case, is of a passive signification, and is governed by substantives or adjectives; as, facile dītū, &c.

They have their name, says Probus, and after him Vossius. Vossius, quod ad infar fupinorum et otiforum hominum omnia habent confusa: or, according to Priscian, quod nascentur a participiis passivis, quae lupina appellata sunt, quia in infimo loco sita, totum conjugationis molem suscipiant.