1. moving or able to move at high speed
2. happening in a short time or without delay
3. firmly fixed or attached

1. at high speed; quickly
2. firmly or tightly

1. a period of eating no food

1. to eat no food for a period of time

Examples

• The fast car raced down the highway.
• She’s a fast runner and won the race easily.
• We need a fast solution to this problem.
• Hold fast to the rope so you don’t fall.
• The boat was stuck fast in the mud.
• Muslims fast during the month of Ramadan.
• He broke his fast with a simple meal.