Impedance (noun)
The act of impeding; that which impedes; a hindrance.
Impedance (noun)
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.
Impedance (noun)
A quantity analogous to electrical impedance in some other energy domain
Impedance (noun)
a measure of opposition to motion of something subjected to a force; the ratio of force to velocity treated as complex quantities.
Impedance (noun)
a measure of the opposition caused by differences between two paradigms, especially between object-oriented development and relational databases
Resistance (noun)
The act of resisting, or the capacity to resist.
“widespread resistance to the new urban development plans”
“the resistance of bacteria to certain antibiotics”
Resistance (noun)
A force that tends to oppose motion.
Resistance (noun)
Shortened form of electrical resistance.
Resistance (noun)
An underground organisation engaged in a struggle for liberation from forceful occupation; a resistance movement.
Resistance (noun)
the refusal to accept or comply with something
“they displayed a narrow-minded resistance to change”
Resistance (noun)
the use of force or violence to oppose someone or something
“she put up no resistance to being led away”
“government forces were unable to crush guerrilla-style resistance”
Resistance (noun)
a secret organization resisting authority, especially in an occupied country
“he went underground and joined the resistance”
Resistance (noun)
the underground movement formed in France during the Second World War to fight the German occupying forces and the Vichy government.
Resistance (noun)
the ability not to be affected by something, especially adversely
“some of us have a lower resistance to cold than others”
Resistance (noun)
lack of sensitivity to a drug, insecticide, etc., especially as a result of continued exposure or genetic change
“many insects show resistance to at least one chemical”
Resistance (noun)
the impeding or stopping effect exerted by one material thing on another
“air resistance was reduced by streamlining”
Resistance (noun)
the degree to which a substance or device opposes the passage of an electric current, causing energy dissipation. By Ohm’s law resistance (measured in ohms) is equal to the voltage divided by the current.
Resistance (noun)
a resistor or other circuit component which opposes the passage of an electric current.