From Longman Dictionary of Contemporary Englishintensivein‧ten‧sive /ɪnˈtensɪv/ ●●○ AWL adjective 1 FAST/QUICKinvolving a lot of activity, effort, or careful attention in a short period of time a one-week intensive course in English a day of intensive negotiations2 → intensive farming/agriculture3 → energy-intensive/knowledge-intensive etc —intensively adverb
Examples from the Corpus
intensive• Before moving to Paris, Michael went on an intensive course to improve his French.• intensive diplomatic efforts to gain a cease-fire• The program includes intensive instruction in English.• After a brief period of intensive training, I was allowed to make my first parachute jump. 