What is "to eat heartily"

Heartily \Heart"i*ly\ (h[aum]rt"[i^]*l[y^]), adv. [From Hearty.]

1. From the heart; with all the heart; with sincerity.

   I heartily forgive them.
   --Shak.

2. With zeal; actively; vigorously; willingly; cordially; as, he heartily assisted the prince.

   To eat heartily, to eat freely and with relish.
   --Addison.

   Syn: Sincerely; cordially; zealously; vigorously; actively; warmly; eagerly; ardently; earnestly.