(1):

(a.) produced in abundance; plenteous; ample.

(2):

(a.) Producing fruit or vegetation in abundance; fruitful; able to produce abundantly; prolific; fecund; productive; rich; inventive; as, fertile land or fields; a fertile mind or imagination.

(3):

(a.) Containing pollen; - said of anthers.

(4):

(a.) Capable of producing fruit; fruit-bearing; as, fertile flowers.