Definition of radiate
1 : to proceed in a direct line from or toward a center
2 : to send out rays : shine brightly
3a : to issue in or as if in raysb : to evolve by adaptive radiation
1 : to send out in or as if in rays
3 : to spread abroad or around as if from a center
Examples of radiate in a sentence
The pain was radiating down my arm.
The sun radiates heat and light.
Heat radiates from the sun.
Origin and Etymology of radiate
Latin radiatus, past participle of radiare, from radius ray
First Known Use: circa 1619
First Known Use of radiate
RADIATE Defined for English Language Learners
Definition of radiate for English Language Learners
: to go out in a direct line from a central point or area
: to move in a specified direction from a source
: to send out (something, such as heat or energy) in rays
RADIATE Defined for Kids
Definition of radiate for Students
1 : to send out rays : shine <The sun was radiating in the sky.>
2 : to come forth in the form of rays <Light radiates from shining bodies.>
3 : to go out in a direct line from a center <Spokes radiate from the center of the wheel.>
4 : to spread around from or as if from a center <Word radiated that Royce McNabb had sent Ina-Rae Gage a valentine. — Richard Peck, A Year Down Yonder>
5 : to show very clearly <She radiates confidence.>
Seen and Heard
What made you want to look up radiate? Please tell us where you read or heard it (including the quote, if possible).