Definition of "Plantain" :

noun: starchy banana-like fruit; eaten (always cooked) as a staple vegetable throughout the tropics

noun: a banana tree bearing hanging clusters of edible angular greenish starchy fruits; tropics and subtropics

noun: any of numerous plants of the genus Plantago; mostly small roadside or dooryard weeds with elliptic leaves and small spikes of very small flowers; seeds of some used medicinally