meal可数吗?I gave the beggar a meal.meal不可数，为甚麽之前家冠词a.

meal是可数名词,意为:餐(饭),一顿（饭）,进餐（时间）
cook a meal 做顿饭 cook one's meal 自己做饭
eat / have a meal 吃一顿饭 take three meals 吃三餐