What does “a deep dive” mean?

Meaning, example sentence and a quick practice question.

A thorough, detailed examination of something

“We need a real deep dive into last quarter's numbers.”

From the C1 lesson Getting Down to Business (meetings).

Quick check

What does “a deep dive” mean?

Teaching this phrase?“a deep dive” is part of a ready-to-teach lesson, with a reading, three exercises, speaking tasks and an answer key, in Everyday English Chunks C1 Pack 3 (Money, Food, Work and Travel).
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