Real Dictionary

full time in American English
as a full-time employee, student, etc.
noun: the number of hours in a period, as a day, week, or month, considered customary for pursuing an activity, esp. working at a job

full time in British English
noun: the end of a football or other match

full-time
Full-time work or study involves working or studying for the whole of each normal working week rather than for part of it.

full-time in American English
designating, of, or engaged in work, study, etc. for certain time periods regarded as constituting one's full regular working hours
adjective: working or operating the customary number of hours in each day, week, or month

full-time in British English
adjective: for the entire time appropriate to an activity
adverb: on a full-time basis