Lewis & Short

imprŏfessus (inpr-), a, um, adj. [2. in-professus].

  1. I. M i d., that has not professed or declared himself (post-Aug.): deferebantur, qui vel improfessi Judaicam intra Urbem viverent vitam, Suet. Dom. 12: servus, Dig. 34, 4, 16.
  2. * II. Pass., that is not professed or declared, Quint. Decl. 341 in lemm.