impedance

1. (countable, uncountable)The act of impeding; that which impedes; a hindrance.

2. (countable, uncountable)A measure of the opposition to the flow of an alternating current in a circuit; the aggregation of its resistance, and inductive and capacitive reactances; the ratio of voltage to current treated as complex quantities.

   a material's opposition to the flow of electric current; measured in ohms

3. A quantity analogous to electrical impedance in some other energy domain

   (countable, uncountable, usually)A measure of opposition to motion of something subjected to a force; the ratio of force to velocity treated as complex quantities.

   Impedanz

   импеда́нсimpedáns

4. (countable, uncountable, usually)The ratio of sound pressure to volume flow rate treated as complex quantities.

regular