solidarity

Etymology

English solidary + -ity, from French solidarité (“solidarity”), from solidaire (“characterized by solidarity”), from Latin solidum (“whole sum”), neuter of solidus (“solid”).

noun

1. (countable) A bond of unity or agreement between individuals, united around a common goal or against a common enemy, such as the unifying principle that defines the labor movement; mutual support within a group.
   A long time union member himself, Phil showed solidarity with the picketing grocery store workers by shopping at a competing, unionized store.
   As a matter of fact the Enlightment culture was based on a philosophy inspired to an ethical laicism whose aim was to create a better society based on principles such as solidarity, equality of rights and duties, and full freedom. 2012, Francesca Valensise, From Building Fabric to City Form: Reconstruction in Calabria at end of Eighteenth Century, Gangemi Editore spa, page 8
   And this year, some of the granite facades have a new addition - the blue and yellow of the flag of Ukraine. It's hardly surprising to see the Scots, a nation more attuned to independence than some, showing solidarity with a country brutally invaded by Russia. November 30 2022, Paul Bigland, “Destination Oban: a Sunday in Scotland”, in RAIL, number 971, page 75
2. (uncountable) Willingness to give psychological and/or material support when another person is in a difficult position or needs affection.
   Only the solidarity provided by her siblings allowed Margaret to cope with her mother's harrowing death.