1. the quality of being convenient and practical despite possibly being improper or immoral
2. the advisability of doing something based on practical rather than moral considerations

Examples

• The politician chose expediency over principle when voting on the controversial bill.
• Military leaders often must balance moral concerns with tactical expediency.
• The company’s decision was based purely on financial expediency.
• She questioned the expediency of lying to protect her friend’s feelings.
• The treaty was signed out of political expediency rather than genuine agreement.
• His actions were driven by expediency, not by what was right.
• The board considered the expediency of postponing the merger until next year.