(define fruits '{ apple 0 banana 1 cherry 2}) ; or (define fruits { 'apple 0 'banana 1 'cherry 2}) ; getting enumeration value: (get fruits 'apple -1) ; ==> 0 ; or simply (fruits 'apple) ; ==> 0 ; or simply with default (for non existent enumeration key) value (fruits 'carrot -1) ; ==> -1