chemically /ˈkɛm.ɪ.kli/adverb 2adjective 1forms 2 adverb2 •Using a chemical reaction, process, or operation. •According to the principles of chemistry. adjective1 •(informal) Reminiscent of chemicals.It starts out as kind of a chemically taste, sharp and irritating, but then there's another taste underneath, like some kind of plant, maybe . . . flowers? — 2013 formsmore chemically · most chemically