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WordNet-Online 
 Definitions from WordNet
Noun mass action has 1 sense 
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| Definitions from the WebMass ActionDefinition: Mass action refers to a collective or coordinated action involving a large number of people or entities, aimed at achieving a common goal. Examples: 
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| mass-market mass-produce mass-produced mass-production mass-spectrometric mass-to-electric mass mass  mass action mass area mass card mass centre mass communication mass communications mass culture mass defect mass deficiency 
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