verb

• (intransitive) To rotate about an off-centre fixed point.
  "The plant swung in the breeze."
• (intransitive) To dance.
• (intransitive) To ride on a swing.
  "The children laughed as they swung."
• (intransitive, sex) To participate in the swinging lifestyle; to participate in wifeswapping.
  "We find it difficult to meet couples our age, and often swing with single, straight men. We have rules: no married guys cheating on their wives, no one too young or too old, and no one who supports Trump."

noun

• (music) The genre of music associated with this dance style.
  "It makes no diff'rence / if it's sweet or hot. / Just give that rhythm / ev'rything you've got! / It don't mean a thing / if it ain't got that swing."
• The amount of change towards or away from something.
  "The polls showed a wide swing to Labour."
• (cricket) Sideways movement of the ball as it flies through the air.
• (theater) In a musical theater production, a performer who understudies several roles.
  "I started as a swing. I mostly played Joanne and Mrs. Jefferson, the “Seasons of Love” soloist. I closed it out. So I was there for about the last four or five years."