n a period marked by distinctive character or reckoned from a fixed point or event
n a major division of geological time; an era is usually divided into two or more periods
n (baseball) a measure of a pitcher's effectiveness; calculated as the average number of earned runs allowed by the pitcher for every nine innings pitched
v remove from memory or existence
v remove by or as if by rubbing or erasing
v wipe out digitally or magnetically recorded information
