Definition
Remainder refers to the part that is left over, still to come, or not yet covered. In NOTAMs and aviation publications, RMNDR is used to refer to the rest of a period, the rest of a route, or the rest of an item being described.
Plain English
The part that's left — what remains after something else has been mentioned or accounted for.
Context Anchor
Seen in NOTAMs when a notice describes one part of an airport surface, time period, or affected area and then refers to what is left.
Derivation
From the Latin remanere, meaning 'to stay behind' or 'be left.' The same root gives us 'remain.' The remainder is simply what stays behind after part has been taken away or addressed.
Why Pilots Care
Lets pilots quickly understand that only part of a surface is affected while the rest remains usable.
Intuition Check
Do not read RMNDR as a separate system, facility, or equipment code. It simply means “the remaining part” or “the rest.”
Example Sentence 1
The runway was closed for the first two hours of the day and open for the RMNDR of the operating period.
Example Sentence 2
Controllers used RMNDR to indicate the remaining taxiway beyond the closed intersection was still available.