Grateful Definition

grātfəl

adjective

gratefuller, gratefullest

Appreciative of benefits received; thankful.

I'm grateful for your help.

American Heritage

Feeling or expressing gratitude; thankful; appreciative.

Webster's New World

Causing gratitude; welcome; pleasing.

Webster's New World

Affording pleasure or comfort; agreeable.

Grateful relief from the hot sun.

American Heritage

I'm grateful that you helped me out.

I'm grateful to you for helping me out.

Wiktionary

Synonyms:

Antonyms:

Other Word Forms of Grateful

Base Form:

grateful

Comparative:

gratefuller

Superlative:

gratefullest

From obsolete grate pleasing from Latin grātus gwerə-² in Indo-European roots

From American Heritage Dictionary of the English Language, 5th Edition
grate +‎ -ful, from Latin gratus (“pleasing, agreeable”) + -ful.

From Wiktionary