summarize: be a summary of; "The abstract summarizes the main ideas in the paper"
sum up: give a summary (of); "he summed up his results"; "I will now summarize"
To prepare a summary of something; To give a recapitulation of the salient facts; to recapitulate or review
(Summarising) to put someone else's concept or main ideas into one's own words.
(Summarising) A summary is similar to a paraphrase except that a summary is shorter. When you summarise, you compress large amounts of information into the fewest possible sentences. To do this, you include only the main points and main supporting points, leaving out the details. ...
Express, concisely, the relevant details
When you are asked to summarise or present a summarisation, you should give in condensed form the main points or facts. All details, illustrations and elaboration are to be omitted.
Give a condensed version drawing out the main facts and omit superfluous information. Brief or general examples will normally suffice for this kind of answer.
Give a concise account of the main points of a matter, omitting details and examples.