A slang term meaning excellent or cool, often associated with youth culture.
RadianceThe quality or state of being radiant; brightness or light.
RadiateTo emit energy, especially light or heat, in the form of rays.
RadicalRelating to or affecting the fundamental nature of something; far-reaching or thorough.
RadiiThe plural of radius, referring to a straight line from the center to the circumference of a circle.
RadiusA straight line from the center to the circumference of a circle or sphere.
RandomMade, done, or happening without method or conscious decision.
RandyAn informal term often used to describe someone who is sexually aroused or lustful.
RansomA sum of money demanded for the release of a prisoner.
ReachTo extend or stretch out something toward a point.
ReactTo respond to something in a particular way.
ReactivateTo make something active again.
RealmA kingdom or domain; an area of activity or interest.
ReanalysisThe act of analyzing something again or in a different way.
ReatAn archaic term for a condition of being or state of being in a particular way.
RebellionAn act of violent or open resistance to an established government or ruler.
RecantTo withdraw or renounce a statement or belief formally.
ReceiveTo be given or presented with something.
ReceptionThe act of receiving or the state of being received.
RecipientA person or thing that receives something.