Concentrated on a single subject or into a short time; very thorough or vigorous
an intensive course in Russian
Designating or relating to an organic approach to intensive agri- or horticulture which seeks to obtain the greatest possible crop yields from the smallest possible areas by sustainable means.
Special medical treatment of a dangerously ill patient, with constant monitoring
(Of a business or industrial process) requiring the investment of large sums of money
(Of a form of work) needing a large workforce or a large amount of work in relation to output