The Collaborative International Dictionary of English v.0.48:

Prose \Prose\, a.
   1. Pertaining to, or composed of, prose; not in verse; as,
      prose composition.
      [1913 Webster]

   2. Possessing or exhibiting unpoetical characteristics;
      plain; dull; prosaic; as, the prose duties of life.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Prose \Prose\, v. t. [imp. & p. p. Prosed; p. pr. & vb. n.
   Prosing.]
   1. To write in prose.
      [1913 Webster]

   2. To write or repeat in a dull, tedious, or prosy way.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Prose \Prose\, v. i.
   1. To write prose.
      [1913 Webster]

            Prosing or versing, but chiefly this latter.
                                                  --Milton.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Prose \Prose\, n. [F. prose, L. prosa, fr. prorsus, prosus,
   straight forward, straight on, for proversus; pro forward +
   versus, p. p. of vertere to turn. See Verse.]
   1. The ordinary language of men in speaking or writing;
      language not cast in poetical measure or rhythm; --
      contradistinguished from verse, or metrical composition.
      [1913 Webster]

            I speak in prose, and let him rymes make. --Chaucer.
      [1913 Webster]

            Things unattempted yet in prose or rhyme. --Milton.
      [1913 Webster]

            I wish our clever young poets would remember my
            homely definitions of prose and poetry, that is;
            prose -- words in their best order; poetry -- the
            best order.                           --Coleridge.
      [1913 Webster]

   2. Hence, language which evinces little imagination or
      animation; dull and commonplace discourse.
      [1913 Webster]

   3. (R. C. Ch.) A hymn with no regular meter, sometimes
      introduced into the Mass. See Sequence.
      [1913 Webster]

WordNet (r) 3.0 (2006):

prose
    n 1: ordinary writing as distinguished from verse
    2: matter of fact, commonplace, or dull expression

Moby Thesaurus II by Grady Ward, 1.0:

52 Moby Thesaurus words for "prose":
   banality, bromide, causerie, chat, chestnut, chin, cliche,
   commonplace, commonplace expression, corn, expository writing,
   familiar tune, hackneyed saying, in prose, language, lieu commun,
   locus communis, matter of fact, matter-of-fact, matter-of-factness,
   nonmetrical, nonpoetic, old joke, old saw, old song, old story,
   plain, plainness, platitude, platitudinize, prosaic, prosaicism,
   prosaicness, prosaism, prosiness, prosing, prosy, rap, reiteration,
   retold story, stereotyped saying, talk, text, trite saying,
   triticism, twice-told tale, unimaginative, unimaginativeness,
   unimpassioned, unversified, write prose, yarn



The Free On-line Dictionary of Computing (30 December 2018):

PROSE

   1. PROblem Solution Engineering.  Numerical problems including
   differentiation and integration.  "Computing in Calculus",
   J. Thames, Research/Development 26(5) (May 1975).

   2. A constraints-and-sequencing system similar to
   Kaleidoscope.  "Reflexive Constraints for Dynamic Knowledge
   Bases", P. Berlandier et al in Proc First Intl CS Conf '88:
   AI: Theory and Appls, Dec 1988.