Wordnet 3.0
ADVERB (2)
1. 
 as a signal; 
- Example: "a term that is used signally rather than symbolically"2. 
 in a signal manner; 
- Example: "signally inappropriate methods"[syn: signally, unmistakably, remarkably]
The Collaborative International Dictionary of English v.0.48:
Signally \Sig"nal*ly\, adv.
   In a signal manner; eminently.
   [1913 Webster]
WordNet (r) 3.0 (2006):
signally
    adv 1: as a signal; "a term that is used signally rather than
           symbolically"
    2: in a signal manner; "signally inappropriate methods" [syn:
       signally, unmistakably, remarkably]