Plain English Meaning
A quick, focused weather update from Flight Service when you already have most of the information you need and just want to fill in the gaps or check something specific.
Full Definition
A shortened weather briefing requested from Flight Service to supplement information already obtained from other sources, to update a previous briefing, or to confirm one or two specific items before a flight.
Context Anchor
Used before a flight when getting weather information from an aviation weather briefer, especially after you already received a full briefing and want an update.
Derivation
"Abbreviated" comes from the Latin brevis, meaning short. The name signals that this is a shorter, more focused version of the standard briefing — not a different kind of briefing.
Why Pilots Care
Saves time when a pilot already holds some weather data and needs only an update or specific elements before departure.