1to eat; to put food into the mouth, chew, and swallow.
毎朝パンを食べる。
I eat bread every morning.
何を食べますか？
What will you eat?
子どもが野菜を食べないので心配だ。
I'm worried because my child won't eat vegetables.
みんなで外で食べるのは楽しい。
Eating out together is fun.
2to live on; to make a living from (used as 'to live on/ by something').
彼は作家として食べている。
He makes a living as a writer.
あの店はコーヒーだけで食べていけないだろう。
That shop probably can't survive on coffee sales alone.
大学の奨学金で食べている学生もいる。
There are students who live on their university scholarships.