Looking with fixed eyes.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (adjective) (adj.) (adjective)
Gazing with a stare.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (adjective, noun) (a. / n.) (adjective / noun)

Usage examples:

I knew it and the two startled guys now staring at us understood it as well.
- The Samurai Strategy by Thomas Hoover
I said, staring at him in turn.
- Historical Romances: Under the Red Robe, Count Hannibal, A Gentleman of France by Stanley J. Weyman
For a long time he sat staring with death in his heart.
- The Adventures of Bobby Orde by Stewart Edward White