Other forms: armrests
An armrest is the padded bar at the side of a seat where your elbow goes. The one you quietly fight your neighbour for on a plane.
Every fixed seat has them: cinema seats, office chairs, aeroplane seats, the sides of a wheelchair. On a chair at home the same part is usually just called an arm, which is where the armchair gets its name. Some armrests do more than rest an arm — they lift out of the way, they hide a cup holder, they carry the controls of an electric seat. Sharing one is a small silent negotiation that no airline has ever solved.
1nounarmrestThe padded support at the side of a seat for your arm.
“He gripped the armrest as the plane took off.”
From arm + rest.
Etymology from Wiktionary, CC BY-SA