As used in this act:

  (a) “Employability services” means an activity which increases the employment potential of an individual, and includes career and vocational education, training, work experience, relocation, and physical rehabilitation.

  (b) “Employment plan” means the full employment plan required by section 3.

  (c) “Full employment” means the highest level of employment which would provide an employment opportunity for every person able and willing to work, which, consistent with other public needs, can be attained during a given period of time by maximizing the investment of public resources toward that end.

  (d) “Subsidized employment” means employment in the private or public sector which results from a direct government payment for all or part of employee wages or benefits in an employment and training program.

  (e) “Unsubsidized employment” means employment in the private or public sector which does not result from a direct government payment for all or part of employee wages or benefits in an employment and training program.