The expression “elephant in the room”, sometimes also “elephant in the living room”, means “a big issue everyone is aware of, but which is being ignored, because everybody finds discussion about it uncomfortable”. The rationale behind the idiom is that an elephant in a (living) room would be impossible to overlook, but people in the room can nevertheless choose to behave as if the elephant was non-existent. For example:
Tip: See my list of the Most Common Mistakes in English. It will teach you how to avoid mistakes with commas, prepositions, irregular verbs, and much more.
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