bank

Reader's Digestには山や海での遭難から助かった話が毎号のように掲載されますが、今年の 4月号には海に墜落した 'The Pilots Who Crashed Into" の記事がありました。その記事からの抜粋です。
Then Uemoto heard the whir of the helicopter again. "It's coming!" she shouted. "This is it, Syd," McMahon said. "This is the one God sent for us." McMahon and Uemoto waved frantically. The helicopter flew overhead and then banked toward them. They'd been seen.
この "bank" はヘリコプターのどの様な動きを示しているのでしょうか？ ・Oxford English Dictionary: (of an aircraft or vehicle) tilt or cause to tilt sideways in making a turn.: [no object] the plane banked as if to return to the airport; [with object] I banked the aircraft steeply and turned.
・Collins Dictionary: When an aircraft banks, one of its wings rises higher than the other, usually when it is changing direction.: A plane took off and banked above the highway in front of him.