If something is solidaristic, it means it shows support and unity with others, especially in a group or community.
Being solidaristic is a very good thing. It means working together and helping each other.
Examples:
The team showed a solidaristic spirit during the game.
She always acts in a solidaristic way, helping her friends when they need it.
The community came together in a solidaristic effort to help those in need.
The solidaristic bond between the friends was unbreakable.
The superheroes fought solidaristically against the villain.
The solidaristic actions of the group made a big difference in the community.