Usually involves feeling of fear or insecurity. The loss of confidence in things that have always been stable or dependable in the past â this includes things such as a relationship, your personality structure, health, etc; so the breakdown of opinions, attitudes or relationships which seemed so dependable and you have taken for granted.
Crests and troughs. Waves have moving crests (or peaks) and troughs. A crest is the highest point the medium rises to and a trough is the lowest point the medium sinks to. Crests and troughs on a transverse wave are shown in Figure 1. A crest is a point on the wave where the displacement of the medium is at a maximum.
Princeton's WordNet(0.00 / 0 votes)Rate this definition: 1  swell, crestless wave(noun) the undulating movement of the surface of the open sea. 2  swell(noun) a rounded elevation (especially one on an ocean floor) 3  swell(noun) a crescendo followed by a decrescendo.