to glide toward the earth in an airplane, with no motor power or with the power shut off.
–noun
2.
a glide in an airplane.
Origin: 1905–10; < F vol plané glided flight, equiv. to vol flight (n. deriv. of voler < L volāre to fly) + plané, ptp. of planer to glide (see plane1)
[vol-pleyn] 
verb, -planed, -plan⋅ing, noun 