RAYON Meaning of RAYON in English ray ‧ on /ˈreɪɒn $ -ɑːn/ BrE AmE noun [uncountable] [ Date: 1900-2000 ; Origin: ⇨ ↑ ray ] a smooth artificial cloth used for making clothes:a rayon shirt Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012