To have some connection to the heart, or be warm.

Seasonally common Japanese "Engrish" word used heavily in marketing. Meaning is somewhat ambiguous.
"Have a heartful White Day."
"Let's have heartful winter."
by sanvé November 26, 2009
To be honset, sincere, and to really mean it.
"It was the truth. I could tell she was being heartful."
by JDiaz March 6, 2005
one whose heart has been broken by a stupid boy. everytime someone says somethin mean or retarded by dey friends is so heartful. in other words country way of sayin somethin mean.
you: hi she i heard ur ex he goes wit girl
she: dats was heartful u knw i still like him
(she runs off cryin)
by ms.she April 2, 2008
used when described a deep and intimate conversation between two individuals more often the opposite sex
"wow look at this laura me and you having a heart to heart , getting to know each other better".
by uk girl August 30, 2006
if you know something in your heart of hearts, you are certain of it although you might not want to admit it.
I knew in my heart of hearts that something was wrong, but I just wasn't ready to deal with it. Do you believe in your heart of hearts that things will get better?
by Infinite2 July 29, 2008
The most trustworthy form of communication is heart to heart between two people.
Jill prefers heart to heart but one on one in a safe space. She won't answer Jack in public because others might hear and matters of the heart are private.
by Freeasabird January 6, 2020
Courge or bravery
-Yo little Nick just stole on Jimbo.
-That kid got heart
by Scouse April 29, 2003