 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.
2. to move or cause to move along on wheels or rollers. 3. to flow or cause to flow onwards in an undulating movement: billows of smoke rolled over the ground. 4. (Zoology) (intr) (of animals, etc) to turn onto the back and kick: the hills roll down to the sea.