The Collaborative International Dictionary of English v.0.48:

Circumspection \Cir`cum*spec"tion\, n. [L. circumspectio.]
   Attention to all the facts and circumstances of a case;
   caution; watchfulness.
   [1913 Webster]

         With silent circumspection, unespied.    --Milton.

   Syn: Caution; prudence; watchfulness; deliberation;
        thoughtfulness; wariness; forecast.
        [1913 Webster]

WordNet (r) 3.0 (2006):

circumspection
    n 1: knowing how to avoid embarrassment or distress; "the
         servants showed great tact and discretion" [syn:
         discretion, discreetness, circumspection, prudence]
    2: the trait of being circumspect and prudent [syn:
       circumspection, caution]