1a point or level which is a designated limit of something:2,500 g is the standard cut-off below which infants are categorized as ‘low birthweight’ [as modifier]:the cut-off date to register is July 2
2an act of stopping or interrupting the supply of something:a cut-off of aid would be a disaster
a device for producing an interruption in flow of a power or fuel supply:the motor has a thermal overload cut-off for safety
a sudden drop in amplification or responsiveness of an electric device at a certain frequency: [as modifier]:a cut-off frequency of 8 Hz
[mass noun] the stopping of the supply of steam to the cylinders of a steam engine when the piston has travelled a set percentage of its stroke:at the moment of starting, cut-off is about 75 per cent
3 (cut-offs) shorts made by cutting off the legs of a pair of jeans or other trousers and leaving the edges unhemmed:she was wearing frayed cut-offs
4North American a short cut.
cut-off in other Oxford dictionaries
Definition of cut-off in the US English dictionary