Definitions for on-the-job
Random House Webster's College Dictionary
done, received, or happening while in actual performance of one's work:
Category: Common Vocabulary
Origin of on-the-job:
relating to or associated with a job or employment
"on-the-job training"; "on-the-job requirements"
working(a), on the job(p)(adj)
actively engaged in paid work
"the working population"; "the ratio of working men to unemployed"; "a working mother"; "robots can be on the job day and night"
obtained whilst working