1. to include (in a group or scope)
この子のことも含めて説明します。I will explain, including this child's situation.
2. to instruct; to make one understand
3. to include (a nuance); to put in (an implication)
しかも彼はこちらの嫌味を含めた言葉にも全く反応を返さない。What's more, he doesn't react at all, even to my words laced with sarcasm.
4. to put in (someone's) mouth
5. to permeate with flavor