■ noun
1》 a sudden powerful forward or upward movement: tidal ~s.
2》 a sudden large temporary increase.
3》 a powerful rush of an emotion or feeling.
■ verb
1》 move in a ~.
2》 increase suddenly and powerfully.
3》 Nautical (of a rope, chain, or windlass) slip back with a jerk.
Origin
C15 (in the sense 'fountain, stream'): the noun from OFr. sourgeon ; the verb partly from the OFr. stem sourge- , based on L. ~re 'to rise'.