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Definition 1 of 3
Pro Tip 1/3Action Initiation
Used when someone is ready to actively begin work or an activity. 
After the meeting, she said, 'Let's get started on the report.'
Pro Tip 2/3Encouraging Start
An invitation for others to begin, often used to motivate a team. 
The coach clapped his hands and said, 'Everyone get started with warm-ups!'
Pro Tip 3/3Immediate Onset
Implies urgency or no further delay to start something. 
The manager announced, 'No more waiting, let's get started right away!'