v.
 (swings, swinging; past and past part. swung)
       - move or cause to move back and forth or from side to side while or as if suspended. ▸informal be executed by hanging. 
- move by grasping a support and leaping. ▸move quickly round to the opposite direction. 
- move or cause to move in a smooth, curving line. ▸
(swing at)
 attempt to hit or punch, especially with a wide curving movement. ▸throw (a punch) with such a movement. 
- shift or cause to shift from one opinion, mood, or state of affairs to another. ▸have a decisive influence on (a vote, judgement, etc.). ▸informal succeed in bringing about. 
- play music with an easy flowing but vigorous rhythm.
- informal be lively, exciting, or fashionable.
- informal be promiscuous, especially by swapping sexual partners.
n.
     - a seat suspended by ropes or chains, on which someone can sit and swing back and forth.
- an act of swinging. ▸the manner in which a golf club or a bat is swung. ▸the motion of swinging. ▸Cricket  sideways deviation of the ball. 
- a discernible change in public opinion, especially in an election.
- a style of jazz or dance music with an easy flowing but vigorous rhythm.
- N. Amer. a swift tour involving a number of stops.
Phrase
  
    - get 
(back)
 into the swing of things
 Brit. informal become accustomed to (or return to) an activity or routine.
- go with a swing
 informal (of a party or other event) be lively and enjoyable.
- in full swing
 at the height of activity.
- swing the lead
 Brit. informal malinger; shirk one's duty. 
[with naut. allusion to using a lead to ascertain the depth of water.]
- swings and roundabouts
 Brit. a situation in which different actions result in no eventual gain or loss.
 
  Derivative
  
  Etymology
  OE swingan ‘to beat, whip’, also ‘rush’, geswing ‘a stroke with a weapon’, of Gmc origin.