 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.
Fold, in geology, undulation or waves in the stratified rocks of the Earthâs crust. Stratified rocks were originally formed from sediments that were deposited in flat, horizontal sheets, but in a number of places the strata are no longer horizontal but have been warped.