chairside noun 2adjective 1adverb 1forms 1 noun2 •A dentist's assistant who helps with the inspection of the patient in the dental chair. •(historical) A kind of radio cabinet for home listening.The big difference between this set and Philco's earlier chairsides […] — 2006 adjective1 •Happening next to the dental chair during treatment.Chairside prosthesis modification can allow same-day insertion. adverb1 •Beside the dental chairThis epoxy can be mixed chairside and applied to wet surfaces. formschairsides