a seasonal prevailing wind in the region of the Indian subcontinent and SE Asia, blowing from the south-west between May and September and bringing rain (the wet monsoon), or from the north-east between October and April (the dry monsoon) 季风 ■the rainy season accompanying the wet monsoon 雨季
派生 monsoonal adjective 语源
late 16th cent.: from Portuguese monção, from Arabic mawsim 'season', from wasama 'to mark, brand'