The Collaborative International Dictionary
Observingly
Observing \Ob*serv"ing\, a. Giving particular attention; habitually attentive to what passes; observant[1]; as, an observing person; an observing mind. -- Ob*serv"ing*ly, adv.
Wiktionary
observingly
adv. attentively, observantly
WordNet
observingly
adv. in an observant manner [syn: observantly]