Definition of "swinging"

swinging¹

/ˈswɪŋɪŋ/

noun
countable and uncountable, plural swingings
1. The act or motion of that which swings.
  Quotations
  Mr. Henderson's chief trouble seems to be that he cannot forget his old shiftiness of views and his pendulum-like swingings between Liberalism and Independent Labourism […]
  1973, Socialist Review, volume 8, page 331
2. An activity where couples engage in sexual activity with different partners, often in a group setting.
verb
1. present participle and gerund of swing
adjective
comparative more swinging or swinginger, superlative most swinging or swingingest
1. (informal) Fine, good, successful.
  Quotations
  Didn't do anything great except saw "The Beatles" on The Ed Sullivan Show and Kathy practically had a bird. They are sorta cute but I think Ringo is swingin, George is cute, Paul is a good singer and John is icky. Too!
  1964, Lou Sullivan, personal diary, quoted in 2019, Ellis Martin, Zach Ozma (editors), We Both Laughed In Pleasure
2. Sexually promiscuous.
  Quotations
  Hey, everyone fantasizes about what kind of swinging stud or studette they could be if they were only free from the shackles of domesticity.
  2003 February 23, Bob Goldman, “Welcome To Splitsville”, in Florida Today‎

swinging²

adjective
comparative more swinging, superlative most swinging
1. Alternative form of swingeing
  Quotations
  “It is an eating fever then,” says the landlady; “for he hath devoured two swinging buttered toasts this morning for breakfast.”
  1749, Henry Fielding, The History of Tom Jones, a Foundling, volumes (please specify |volume=I to VI), London: A[ndrew] Millar, […]