motion  
 noun uk/ˈməʊ.ʃən/ us/ˈmoʊ.ʃən/
  (MOVEMENT)         
 C2 [ C or U ]动;运动;移动 
the act or process of moving, or a particular action or movement
  The violent motion of the ship upset his stomach. 船的剧烈摇晃使他的胃很不舒服。 
 He rocked the cradle with a gentle backwards and forwards motion. 他轻轻地前后晃动摇篮。 
 They showed the goal again in slow motion (= at a slower speed so that the action could be more clearly seen). 他们用慢动作又播了一遍进球镜头。 
  [ C ] UK(委婉语)排便;大便,粪便 
a polite way of referring to the process of getting rid of solid waste from the body, or the waste itself
  The nurse asked if her motions were regular. 护士问她大便是否正常。 
 - More examples
 - Onstage she is a human dynamo, spending the hour in perpetual motion.
 - He gloved the ball, turned, and threw in one motion.
 - The motion of the car almost lulled her to sleep.
 - The spaceship's jets were fired periodically to dampen a side-to-side pendulum motion that had developed.
 - I thought a phone call to the right person might set the wheels in motion.
 
  (SUGGESTION)      
C2 [ C ](会议中正式提出准备表决的)提议,动议 
a formal suggestion made, discussed, and voted on at a meeting
  [ + to infinitive ] Someone proposed a motion to increase the membership fee to $500 a year. 有人提议将年会费增加至500美元。 
 The motion was accepted/passed/defeated/rejected. 提议被接受/通过/驳倒/否决了。 
 - More examples
 - Delegates have voted in favour of the motion.
 - Anyone wishing to dissent from the motion should now raise their hand.
 - Those voting for the motion, 96, and those voting against, 54.
 - The motion for tonight's debate is, "This house believes that capital punishment should be abolished."
 - He proposed a motion that the chairman resign.
 
Idioms      
go through the motionsidiom  informal disapprovingC2 装装样子;敷衍了事
to do something without thinking it is very important or having much interest in it
  He says he's been investigating my complaint, but I feel he's just going through the motions. 他说他一直在调查我的投诉,可我觉得他只是在敷衍了事。 
 put/set something in motionidiom  使…开始运转,启动
to start a machine or process
  Once the printing processes have been put in motion, they're not so easy to stop. 印刷工序一旦启动,就不容易停止了。 
 We filled in a form to set the whole process in motion. 我们填写了表格,启动一整套程序。 
 motion       
verb [ I or T, usually + adv/prep ] uk/ˈməʊ.ʃən/ us/ˈmoʊ.ʃən/
 打手势;点(或摇)头示意
to make a signal to someone, usually with your hand or head
  I saw him motion to the man at the door, who quietly left. 我看到他向门口的人示意,那人便悄然离开了。 
 Her family all gathered around her, but she motioned them away. 家人都围到她身边,但她示意他们离开。 
 [ + obj + to infinitive ] He motioned me to sit down. 他示意我坐下。 
 Synonyms: gesticulate gesture