What does dewpoint mean?

Question

Question ATPL - Airline Transport Pilot license - Meteorology

QuizVDS · Accepted Answer

The temperature to which a mass of air must be cooled in order to reach saturation.

QuizVDS · Answer

The temperature at which ice melts.

QuizVDS · Answer

The freezing level (danger of icing).

QuizVDS · Answer

The temperature at which the relative humidity and saturation vapour pressure are the same.

Id 463 - ATPL - What does dewpoint mean?