Definition
A NOTAM contraction meaning entire — that is, the whole of something, with nothing left out. Used in NOTAM text to indicate that a condition, closure, or restriction applies to all of a named item (for example, an entire runway, taxiway, or area) rather than just a portion of it.
Plain English
ENTR is shorthand for 'entire.' It tells the pilot that whatever the NOTAM is talking about applies to the whole thing, not just part of it.
Context Anchor
Seen in NOTAMs and FAA abbreviation lists when a notice needs to say that something applies to the whole airport, runway, taxiway, area, or facility.
Derivation
From the Latin integer, meaning 'whole' or 'untouched,' which became entier in Old French and entire in English. The aviation contraction simply drops the vowels to save characters in NOTAM transmissions.
Why Pilots Care
Prevents misreading the scope of a closure or hazard so the pilot knows exactly what portion of the airport or airspace is affected.
Intuition Check
ENTR can look like “enter” or “entry,” but in this context it does not mean to go in. It means entire: the whole named thing is involved.
Example Sentence 1
The NOTAM read 'RWY 09/27 CLSD ENTR LGTH,' meaning the runway was closed for its entire length.
Example Sentence 2
ENTR AP affected by wildlife activity.