Definition of love-in noun from the Oxford Advanced American Dictionary

     

    love-in

     noun
    noun
     
    (informal)
     
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  1. 1(old-fashioned) a party at which people freely show their affection and sexual attraction for each other, associated with hippies in the 1960s
  2. 2 (disapproving) an occasion when people are being especially pleasant to each other, in a way that you believe is not sincere All the managers are getting together for their annual love-in.
See the Oxford Advanced Learner's Dictionary entry: love-in