The Collaborative International Dictionary of English v.0.48:

Retrench \Re*trench"\, v. t. [imp. & p. p. Retrenched; p. pr.
   & vb. n. Retrenching.] [OF. retrenchier, F. retrancher;
   pref. re- re- + OF. trenchier, F. trancher, to cut. See
   Trench.]
   1. To cut off; to pare away.
      [1913 Webster]

            Thy exuberant parts retrench.         --Denham.
      [1913 Webster]

   2. To lessen; to abridge; to curtail; as, to retrench
      superfluities or expenses.
      [1913 Webster]

            But this thy glory shall be soon retrenched.
                                                  --Milton.
      [1913 Webster]

   3. To confine; to limit; to restrict. --Addison.
      [1913 Webster]

            These figures, ought they then to receive a
            retrenched interpretation?            --I. Taylor.
      [1913 Webster]

   4. (Fort.) To furnish with a retrenchment; as, to retrench
      bastions.
      [1913 Webster]

   Syn: To lesen; diminish; curtail; abridge.
        [1913 Webster]