 Summer of '69  is a song recorded by Canadian recording artist Bryan Adams, from his fourth studio album, Reckless (1984). The song was written by Adams and Jim Vallance, a long-time writing partner of Adams.
â¢ UNDULATION (noun). The noun UNDULATION has 3 senses: 1. an undulating curve. 2. wavelike motion; a gentle rising and falling in the manner of waves. 3. (physics) a movement up and down or back and forth. Familiarity information: UNDULATION used as a noun is uncommon.
It began to undulate like the threads of a cobweb lifted by the wind. For variety's sake the engineer made it undulate horizontally, like a great serpent flying over the earth. The momentum of his jump carried him in a long swing, and he at once began to undulate himself to increase his swing.