1. the total opposition that a circuit or device presents to the flow of alternating electric current, measured in ohms.
Usage: technical term used in electrical engineering and physics
2. any factor or condition that opposes or hinders progress or movement.
Usage: figurative use

Examples

• The impedance of the speaker must match the amplifier's output impedance for optimal sound quality.
• High impedance in the circuit reduced the current flow significantly.
• Engineers calculated the impedance to ensure the device would function properly.
• The impedance between the two systems created compatibility issues.
• Reducing impedance in the transmission line improved signal transmission.
• Cultural differences presented an impedance to effective communication between the teams.