The Collaborative International Dictionary of English v.0.48:
-ess \-ess\ [OF. -esse, LL. -issa, Gr. ?.] A suffix used to form feminine nouns; as, actress, deaconess, songstress. [1913 Webster]V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):
ESS Embedded Security System (IBM, TPM)V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):
ESS Extended Service Set (WLAN)