arch

Short definition from Wiktionary

Noun

1. 1
   An inverted U shape.
2. 2
   An arch-shaped arrangement of trapezoidal stones, designed to redistribute downward force outward.
3. 3
   An architectural element having the shape of an arch
4. 4
   Any place covered by an arch; an archway.
5. 5
   An arc; a part of a curve.
6. 6
   A natural arch-shaped opening in a rock mass.
7. 7
   The curved part of the bottom of a foot.
8. 8
   A chief.
9. 9
   Synonym of god (“person who owns and runs a multi-user dungeon”).

Verb

1. 1
   To form into an arch shape.
2. 2
   To cover with an arch or arches.

Adjective

1. 1
   Knowing, clever, mischievous.
2. 2
   Cute, sly, prematurely wise.
3. 3
   Principal; primary.
4. 4
   Initialism of autoregressive conditional heteroskedasticity

Proper noun

1. 1
   A diminutive of the male given names Archibald or Archie.