Source : Webster's Revised Unabridged Dictionary (1913)

Circumstantially \Cir`cum*stan"tial*ly\, adv.
   1. In respect to circumstances; not essentially;
      accidentally.

            Of the fancy and intellect, the powers are only
            circumstantially different.           --Glanvill.

   2. In every circumstance or particular; minutely.

            To set down somewhat circumstantially, not only the
            events, but the manner of my trials.  --Boyle.

Source : WordNet®

circumstantially
     adv 1: according to circumstances; "he was convicted
            circumstantially"
     2: so far as the circumstances are concerned; "the account was
        circumstantially accurate"
     3: in minute detail; "our inability to see everything minutely
        and clearly is due merely to the infirmity of our senses"
        [syn: {minutely}]
     4: without advance planning; "they met accidentally" [syn: {by
        chance}, {accidentally}, {unexpectedly}] [ant: {intentionally}]