trigly adverb 1noun 1forms 2 adverb1 •In a trig manner; neatly; smartly.Meeting him one day when trigly dressed, the doctor broke out with, “Joe, can you tell me the difference between you and the devil? ” — 1876 noun1 •(informal) Triethylene glycol dichloride.The solubility of plutonium(IV) in trigly was found to be 70 mg/ml. — 1964 formsmore trigly · most trigly