n.
Function: noun
Date: 1520
1 : a swelling, rolling, or sweeping forward like that of a wave or series of waves <a surge of interest>
2 a : a large wave or billow : SWELL b (1) : a series of such swells or billows (2) : the resulting elevation of water level
3 a : a movement (as a slipping or slackening) of a rope or cable b : a sudden jerk or strain caused by such a movement
4 : a transient sudden rise of current or voltage in an electrical circuit