Longman Dictionary of Contemporary English - surfing

surge ~1 v 1 if a crowd of people surges, they suddenly move forward together very quickly + forward/through etc  (The crowd surged through the gates.) 2 also surge up if a feeling surges or surges up you begin to feel it very strongly  (Helpless rage surged up within me.) 3 if a large amount of water surges, it moves very quickly and suddenly ~2 n C usually singular 1 a surge of a sudden, large increase in a feeling  (a surge of excitement) 2 a sudden increase in something such as demand, profit, interest etc + in  (stores expecting the usual surge in demand as Christmas approaches) 3 a sudden movement of a lot of people + of  (a surge of refugees into the country)