Entry 1 sense Webster, 1913 Gardening /gär′dən-ĭng/ · Gar·den·ing · IPA /ˈɡɑɹ.dən.ɪŋ/ 01 n. The art of occupation of laying out and cultivating gardens; horticulture. 1. The art of occupation of laying out and cultivating gardens; horticulture.