See also: Appendix:Variations of "sia" English Noun SIA (uncountable) Initialism of Social Impact Assessment. Related terms EIA HIA Anagrams ais, A.S.I., Asi, AIS, a-Si, is-a, Ais, sai, Isa, A.I.s, Isa., IAS, ASI, IAs, AIs, A. S. I., ISAWikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads