Learner's definition of INDEED
1
: without any question确实；的确；毫无疑问 —
used to stress the truth of a statement用于强调一句话的真实性 -
Indeed, he is a great poet. = He is indeed a great poet.他确实是一位伟大的诗人。
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This is indeed [=certainly] a matter of great importance.这的确是一件很重要的事情。
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They were indeed heroes, though they were never honored.尽管从来没被授予称号，可他们确实是英雄。
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She does indeed work here.她的的确确是在这儿工作。
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I will indeed be there.我肯定会在那儿的。
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The problem is a serious one indeed.这的确是个严肃的问题。
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“Do you know him?” “I do indeed.” = “Indeed I do.”“你认识他吗？”“我的确认识。”
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“Do you know him?” “Yes, indeed!” [=I certainly do]“你认识他吗？”“是的，当然认识！”
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often used after very 常用在very后 2
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used in response to a statement that is regarded as doubtful or surprising真的吗，哦（用于回答有疑问或令人吃惊的话） -
“I did my best.” “Did you indeed?”“我尽力了。”“真的吗？”
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“The project is still on schedule.” “Is it indeed?”“这个项目仍按计划进行。”“真的吗？”
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“He claims that it was just a misunderstanding.” “Indeed?”“他说那不过是个误会。”“真的？”
3
formal —
used when making a statement that adds to or strengthens a previous statement确实，的确（用于加强前面一句话） -
He likes to have things his own way; indeed, he can be very stubborn.他喜欢按自己的方式行事；说实在的，他可是非常顽固。
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She is quite lovely, indeed a beauty.她很可爱，确实是个美人儿。
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Many people objected. Indeed, my uncle complained in writing.许多人都反对。事实上，我伯父还写了书面抗议。
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It is possible—indeed, probable—that the crime was an inside job.这起犯罪可能——确实很可能——是内部人所为。
4
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used in a question that repeats and emphasizes a preceding question to show that you do not know the answer用于问句，重复并强调前面的问题以表明不知道答案 -
“How can we help them?” “How, indeed?”“我们能怎样帮他们呢？”“是啊，怎样帮他们呢？”
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“When will they come here again?” “When, indeed?”“他们何时会再来呢？”“是啊，什么时候再来呢？”
a friend in need is a friend indeed
— see friend