Longman Dictionary of Contemporary English homepage

Topic: PHYSICS

Date: 1600-1700
Language: Latin
Origin: 'movement, moment', from movere 'to move'

momentum

 noun
     
mo‧men‧tum [uncountable]
1 the ability to keep increasing, developing, or being more successful
gain/gather momentum
The campaign for reform should start to gather momentum in the new year.
incentives to maintain the momentum of European integration
Governments often lose momentum in their second term of office.
momentum of
the momentum of increasing immigration
momentum towards
the momentum towards economic union
2 the force that makes a moving object keep moving
gain/gather momentum (=move faster)
The wheel was allowed to roll down the slope, gathering momentum as it went.
Pratt, without losing any momentum at all, passed them both and won the race.
3 technicalHPTEM the force or power that is contained in a moving object and is calculated by multiplying its weight by its speed
momentum of
the momentum of a particle
Definition of momentum from the Longman Dictionary of Contemporary English within
the topic PHYSICS
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