1. a formal promise or pledge, especially one made on behalf of another person or entity
Usage: formal; legal
2. the act of becoming a sponsor or taking responsibility for someone or something
Usage: formal

Examples

• The company’s sponsion of the research project ensured adequate funding.
• His sponsion for the immigrant family helped them obtain legal status.
• The bank required a sponsion from a guarantor before approving the loan.
• The sponsion agreement outlined the responsibilities of both parties.
• Without proper sponsion, the venture could not proceed.
• The legal document contained a clause regarding sponsion liability.