n.
1.one of the jointed appendages of an animal used for locomotion or grasping: arm
2.any of the main branches arising from the trunk or a bough of a tree
3.(astronomy) the circumferential edge of the apparent disc of the sun or the moon or a planet
4.either of the two halves of a bow from handle to tip
5.the graduated arc that is attached to an instrument for measuring angles
6.any projection that is thought to resemble an arm
Idiom of the Day
keep (someone) up or keep up (someone)
to prevent someone from going to bed
My neighbors kept me up last night with their loud music.