1. extremely fast or quick
Usage: informal

1. in an extremely fast manner
Usage: informal

Examples

• The new superfast train can reach speeds of 200 mph.
• She has a superfast internet connection at home.
• The superfast computer processed the data in seconds.
• He ran superfast to catch the bus.
• The superfast delivery service guarantees same-day shipping.
• The athlete’s superfast reflexes helped her win the race.