1. plural of impedance; measures of opposition to alternating current in electrical circuits
Usage: electrical engineering; physics
2. plural of impedance; obstacles or hindrances to progress or movement
Usage: formal

Examples

• The engineer measured the impedances of all circuit components.
• Different frequencies produce varying impedances in the same circuit.
• The speaker’s impedances must match the amplifier’s output.
• High impedances can reduce signal quality in audio equipment.
• The technician calculated the total impedances across the network.
• Various impedances in the system caused unexpected delays.
• They identified several impedances blocking the project’s completion.