noun

1. a person, animal, etc. that is running away or has run away; specif.,
   1. a fugitive or deserter
   2. a horse, team of horses, etc. that has broken loose from control of the rider or driver
2. the act of running away
3. a runaway race or victory

adjective

1. running away or having run away; escaping, eloping, or breaking loose from control runaway lovers, a runaway horse
2. of or done by runaways or running away a runaway marriage
3. easily won, as a race, or decisive, as a victory
4. 1. rising rapidly, as prices
   2. characterized by an uncontrolled rise of prices runaway inflation
5. ☆ relocated in order to evade agreements with a local union, local taxes, etc. a runaway shop