A full stomach; the state of having eaten until satisfied (feeling full).
美味しい料理をたくさん食べて満腹になった。
I ate a lot of delicious food and became full.
満腹でもデザートは別腹だと言う人もいる。
Some people say there's always room for dessert even when they're full.
薬を食後に飲んだほうが満腹時に安全だ。
It's safer to take the medicine after a meal (when you're full).
Complete, full, or wholehearted (figuratively: thoroughly satisfied or full in a non-physical sense).
彼は達成感で満腹の表情をしていた。
He had a satisfied expression full of a sense of accomplishment.
成功の喜びで胸が満腹になったようだ。
It seemed his heart was full with the joy of success.