joint responsibility; shared liability
Refers to responsibility shared among multiple parties, often in legal, business, or group contexts. The gloss 'solidarity' is a less common translation and can be misleading; the core meaning is shared accountability.
The failure of this project is the joint responsibility of the entire team.
We drew up a contract to clarify the shared liability.
連帯責任 implies collective responsibility where each member is liable for the whole, often with a stronger legal or moral connotation. 共同責任 is more neutral and simply means responsibility is shared.
Compound of 共同 (きょうどう, 'joint, shared') and 責任 (せきにん, 'responsibility').