Used to describe a gradual process of gathering small pieces of information. He gleaned the facts about the event by reading various eyewitness accounts.
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Attention to Detail
Implies paying close attention in order to gather bits of information that are not obvious. An attentive reader can glean subtle themes in the author's writing.
Pro Tip 3/3
Metaphorical Use
Often used metaphorically to describe the act of collecting non-physical items, like facts or ideas. She gleaned a few creative concepts from the brainstorming session.