golden section Syllabification: (gold·en sec·tion)Definition of golden section noun the division of a line so that the whole is to the greater part as that part is to the smaller part (i.e., in a ratio of 1 to 1/ 2 (√5 + 1)), a proportion that is considered to be particularly pleasing to the eye. golden section in other Oxford dictionaries Definition of golden section in the British & World English dictionary