And the Seagram Building undulates almost 20ft into the air from a movie reel-like base.

BBC: A fluid take on New York City��s landmarks

To a contrarian investor, any gap that undulates from decade to decade is enticing at its extremes.

FORBES: Sell Houses, Buy Chips

Apparently satisfied, the leathery old matriarch taps the side of her head, points at my face and undulates away.

BBC: In search of the perfect road in Mallorca

The song undulates, swinging between soothing instrumental moments and thrilling walls of sound.

NPR: From Office to Office, a Thrilling Escape

The roof of the Louvre's new Islamic art department undulates like golden fabric gently lifted by the wind a feat, considering it is made of steel and glass and weighs almost 150 tons.

WSJ: Islam at the Louvre