listening

Definitions:

giving attention
- Wordnet Dictionary DB (adjective) (adj.) (adjective)
The act of listening or giving attention.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (noun) (n.) (noun)

Usage examples:

So I lay there quietly, listening
- The Metal Monster by A. Merritt
Nikolai sat listening to us.
- Look Back on Happiness by Knut Hamsun
It is better that we talk without Paul listening
- The Brightener by C. N. Williamson A. M. Williamson