Longman Dictionary of Contemporary English
Wiktionary
n. In the tourist industry, the period of highest demand. In a sun and sand resort this means the hottest months, whereas in a ski resort, this means the coldest months.
WordNet
n. the season when travel is most active and rates are highest; "they traveled to Europe in high season" [syn: peak season] [ant: off-season]
Wikipedia
High Season is a 1987 British romantic comedy film directed by Clare Peploe. It is a comedy about tourism, set on the Greek island of Rhodes; vacationers from rich countries taking over the most spectacular scenery at the most desirable times of the year. There are nine principal characters, a mixture of English, Greek, and a Greek-American. It was written by director Clare Peploe with her brother Mark.
Usage examples of "high season".
A five star operation, with top entertainment in the bars, like the Driftwood at the peak of high season could deposit a good six hundred thousand dollars a week.
Sorting them out had consumed a tedious month, during which Finster stayed as a guest at the resort during the high season, eating too many gourmet meals.
The high season wasn't all that far off, and she had the kind of personality that might make a success out of a little booth of prayer fans and Heechee lucky pieces for the Terry tourists.