sideline - definition and synonyms

noun [countable] 

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/ˈsaɪdˌlaɪn/
singularsideline
pluralsidelines
  1. 1
    a job that you do in addition to your main job, in order to earn extra money
  2. 2
    either of the lines on the sides of a sports field that show where the edges of the field are
    1. a.
  3. 3

    the sidelines

    a situation in which you watch something that is happening but are not involved in it or cannot influence it

    This is no time for sitting on the sidelines – our government must get involved.

  4.   From our crowdsourced Open Dictionary
    4
    keep someone/something on the sidelines to prevent someone or something from getting involved

    Men and women at the moment are so preoccupied with everyday gruelling schedule of life that they have no regrets about keeping humanity and humane treatment on the sidelines.

    Submitted by Prakash Chandra Patel from India on 20/11/2016