radiate

1 of 2

verb

ra·​di·​ate ˈrā-dē-ˌāt 

radiated; radiating

intransitive verb

1

: to proceed in a direct line from or toward a center

2

: to send out rays : shine brightly

3

a

: to issue in or as if in rays

b

: to evolve by adaptive radiation

transitive verb

1

: to send out in or as if in rays

2

: irradiate, illuminate

3

: to spread abroad or around as if from a center

radiate

2 of 2

adjective

ra·​di·​ate ˈrā-dē-ət  -ˌāt 

: having rays or radial parts: such as

a

: having ray flowers

b

: characterized by radial symmetry : radially symmetrical

radiately adverb

Synonyms of radiate

Verb

• emanate
• ray
• derive
• diverge
• flow
• stem
• branch

Examples of radiate in a Sentence

Verb

The pain was radiating down my arm.

The sun radiates heat and light.

Heat radiates from the sun.

Recent Examples on the Web

Verb

Pain, numbness or tingling that radiates from the neck or back into the arm or hand, the Mayo Clinic warning sign for a herniated disc affecting upper-extremity strength. — Samantha Agate, Sacbee.com, 25 July 2026

Although the meteors appear to radiate from the constellation Perseus, the longest and brightest streaks are often seen well away from the radiant. — Jamie Carter, Forbes.com, 25 July 2026

Besides the matching outfits, the young princes radiate the same playful energy in their candid photos—taken in 1985 and 2017, respectively. — Bailey Bujnosek, InStyle, 22 July 2026

Throughout the evening, the Parrish’s executive director, Mónica Ramírez-Montagut, could be found greeting guests, radiating positive energy and enthusiasm. — Vanessa Grigoriadis, Vanity Fair, 21 July 2026

Word History

Etymology

Verb

Latin radiatus, past participle of radiare, from radius ray

First Known Use

Verb

1598, in the meaning defined at intransitive sense 2

Adjective

1668, in the meaning defined above

Kids Definition

radiate

verb

ra·​di·​ate

ˈrād-ē-ˌāt

radiated; radiating

1

: to proceed in a direct line from or toward a center

2

a

: to send out rays : shine

b

: to come forth in the form or as if in the form of rays

3

: to spread around from or as if from a center

Etymology

Verb

Latin radiare "to proceed from or toward a center," from radius "ray, beam, spoke" — related to radio, radius, ray entry 2

Medical Definition

radiate

1 of 2 verb

ra·​di·​ate ˈrād-ē-ˌāt 

radiated; radiating

intransitive verb

: to issue in or as if in rays : spread from a central point

back pain radiating to both upper legs

—Tony Miksanek

transitive verb

: irradiate

radiate

2 of 2 adjective

ra·​di·​ate ˈrād-ē-ət, -ē-ˌāt 

1

: having rays or radial parts

2

: characterized by radial symmetry : radially symmetrical