- 1surge (of something) a sudden increase of a strong feeling synonym rush She felt a sudden surge of anger. a surge of excitement see also upsurge
- 2a sudden increase in the amount or number of something; a large amount of something surge (in something) a surge in consumer spending We are having trouble keeping up with the recent surge in demand. surge (of something) After an initial surge of interest, there has been little call for our services. see also upsurge
- 3 surge (of something) a sudden, strong forward or upward movement a tidal surge A surge of people poured through the gates. see also storm surge
- 4 a sudden increase in the flow of electrical power through a system An electrical surge damaged the computer's disk drive. The electrical grid was hit by a huge power surge.