/ ˌsɒlɪˈdærəti; NAmE ˌsɑːl-/ noun
[ U ] solidarity (with sb) support by one person or group of people for another because they share feelings, opinions, aims, etc. :
community solidarity
to express / show solidarity with sb
Demonstrations were held as a gesture of solidarity with the hunger strikers.
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WORD ORIGIN
mid 19th cent.: from French solidarité , from solidaire solidary.