What is the meaning of “outsourced workers?”
1) What is the meaning of “outsourced workers?”
2) a second contractor = a subcontractor?
3) Is it totally correct to say:
to subcontract - to draw subcontractors to do some work
to outsource - to draw outside people to do some work

Question

Answer

outsourced workers - workers not belonging to the organisation who is hired to do the work. Let's say Joe runs a plumbing business, but has more work than he can handle. He then finds another company (his competitor) and outsources the job to them, while staying the middle-man, the link between the original contractor and the company actually doing the work. 
Or, he could also be working with individual subcontractors (tradesmen working for themselves).

second contractor - not a subcontractor, it's a second person doing part of the work under the same arrangement as the first one. Generally a subcontractor doesn't get to deal with the customer directly, while a second contractor does.

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