In a wider, more informal context, an allusion is a passing or casually short statement indicating broader meaning. It is an incidental mention of something, either directly or by implication, such as In the stock market he met his Waterloo..
The definition of a bump is a light jolt or a swollen, raised lump on the body. An example of a bump is the act of two toy cars hitting each other. An example of a bump is a welt on the hand. To bump is defined as to collide lightly. An example of to bump is for a car to knock gently into the back of another.
Bump testing refers to a functional test of the device to verify calibration. accomplished by exposing the device to a known concentration of test gas. Please note that a Bump Test does not Calibrate the device. recommended every 180 days to ensure the device will accurately respond to H2S gas.