valetudinary adjective 1noun 1forms 3 adjective1 •(no longer used) Sickly, infirm, valetudinarian."His Majesty began to become valetudinary; and the hypochondria which tormented him rendered his humor very melancholy. — 1727 noun1 •(old-fashioned) A sickly, infirm person. formsvaletudinaries · more valetudinary · most valetudinary