plane

/plɑ̃/planer
1.
verbInd1stPresSing1,3

is high (on drugs)

is daydreaming; is spacing out

Arrête de lui parler, il plane complètement à cause de la fatigue.

Stop talking to him, he's completely spacing out because of the tiredness.

2.
verbInd1stPresSing1,3

glide; soar (move smoothly through the air without flapping)

L'albatros plane au-dessus de l'océan.

The albatross is gliding above the ocean.

3.
adjectivemasculine | feminine

flat; level

Il faut poser le meuble sur une surface bien plane.

You need to place the piece of furniture on a very flat surface.