Simple Examples:
* The workers showed solidarity by refusing to cross the picket line.
* The students stood in solidarity with their teacher who was facing unfair accusations.
* The community came together in solidarity to support the victims of the storm.
More Complex Examples:
* The international community expressed solidarity with the country facing a humanitarian crisis.
* The movement was founded on the principle of solidarity and mutual support.
* Their shared experiences fostered a strong sense of solidarity among the group.
Figurative Examples:
* The team displayed a solidarity that was impossible to break.
* The protesters marched with unwavering solidarity in the face of police brutality.
The best way to use "solidarity" in a sentence depends on the specific context and the message you want to convey.