Plain English Meaning
A pointer to a particular paragraph in the FAA's AIM rulebook. AIM 7-2-3 is the paragraph that explains how cold air makes your altimeter read higher than you actually are, and what to do about it.
Full Definition
A specific section reference within the FAA's Aeronautical Information Manual (AIM), Chapter 7 (Safety of Flight), Section 2 (Altimeter Setting Procedures), paragraph 3, which addresses altimeter errors caused by cold temperatures and provides guidance on cold temperature altitude corrections.
Context Anchor
Seen in instrument training when cold-temperature altitude corrections and altimeter are being discussed.