| 释义 | 
		Definition of rock fan in English: rock fannoun ˌrɒk ˈfan Geomorphology A convex, fan-shaped rock surface, typically covered with rock fragments, formed by water erosion, typically at the foot of a slope where the course of a stream widens and becomes less steep. 
 noun ˌrɒk ˈfan An enthusiast of rock music. 
 Origin   Early 20th century. From rock + fan 1950s; earliest use found in The Guardian. From rock + fan.    Definition of rock fan in US English: rock fannounˌrɒk ˈfan Geomorphology A convex, fan-shaped rock surface, typically covered with rock fragments, formed by water erosion, typically at the foot of a slope where the course of a stream widens and becomes less steep. 
 nounˌrɒk ˈfan An enthusiast of rock music. 
 Origin   Early 20th century. From rock + fan<br>1950s; earliest use found in The Guardian. From rock + fan.     |