SINCE 1828
knock on
transitive verbDefinition of knock on
(Entry 1 of 3)
: to knock onward : knock forward
specifically
: to knock (the ball in rugby) forward in the direction of the opponents' dead-ball line with the hand or arm
knock-on
noun
plural knock-ons
Definition of knock-on (Entry 2 of 3)
: the action of knocking on
knock-on
adjective
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Definition of knock-on (Entry 3 of 3)
: produced or projected as a result of the collision of an energetic particle (as a neutron or fission fragment) from outside an atom with an elementary particle inside
a knock-on shower of particles a knock-on atom a knock-on electron
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