See indeed in Webster's New World College Dictionary
adverb
certainly; truly; admittedly: often used for emphasis or confirmation [it is indeed warm] or, in questions, to seek confirmation [did she indeed tell you that?]
interjection
used to express surprise, doubt, sarcasm, irony, etc.
See indeed in American Heritage Dictionary 4
(ĭn-dēdˈ)
adverb
Without a doubt; certainly: very cold indeed; was indeed grateful.
In fact; in reality: felt sure I'd win, and indeed I did.