a large ring of plastic, wood or iron 箍；環；圈 
The barrel was bound with three iron hoops. 那個桶用三個鐵環箍住了。
- (also hoop earring)
an earring in the shape of a ring 圈狀耳環 a pair of plain gold hoops 一對純金環形耳環
the ring that the players throw the ball through in the game of basketball in order to score points （籃球）籃圈；籃筐 
- hoops[uncountable] (North American English, informal)
the game of basketball （籃球）籃圈；籃筐 He played junior college hoops in California. 他在加州打大專籃球。
a large ring that was used as a children’s toy in the past, or for animals or riders to jump through at a circus （舊時兒童玩的）大環子；（馬戲團用的）大圈 - (also hula hoop, US English Hula-Hoop™)
a large plastic ring that you move in a circle around the middle part of your body by moving your hips 呼啦圈 a small arch made of metal or plastic, put into the ground （兩端埋在地裏的）小鐵弓，小塑料弓 croquet hoops (= in the game of croquet) 槌球戲中的拱門 Grow lettuces under plastic stretched over wire hoops. 在鐵弓撐起的塑料棚下種植生菜。
Word Originlate Old English hōp, of West Germanic origin; related to Dutch hoep.
Idioms
jump through hoops
to do something difficult or complicated in order to achieve something （爲達到目的而）經受磨難 You have to jump through so many hoops to get a job like this. 要得到這樣一份工作，你必須經歷許多困難。