In a way that involves working together with others toward a shared goal.
From 'cooperative' (adjective) + '-ly' (adverb suffix). Cooperative itself comes from Latin 'cooperativus,' from 'cooperari' (to work together).
When you describe something as happening 'cooperatively,' you're highlighting collaboration as the *mode* of operation. Food cooperatives, credit unions, and worker co-ops all operate cooperatively, sharing ownership and decision-making equally among members.
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