Dites à ces personnes de se retirer, afin que l'hélicoptère puisse se poser.

English Translation

Tell these people to move away, so that the helicopter can land.

se retirer = to move out of the way
retire-toi de là, tu me gênes = stand somewhere else, you’re in my way

© The Collins Robert Concise French Dictionary (Le Robert & Collins Compact) applications are based on Collins Robert Concise Dictionary 8th Edition © HarperCollins Publishers and Dictionnaires Le Robert 2011.