adj.
1.being one more than four v n.
1.a unit of potential equal to the potential difference between two points on a conductor carrying a current of 1 ampere when the power dissipated between the two points is 1 watt
2.a soft silvery white toxic metallic element used in steel alloys
3.the cardinal number that is the sum of four and one
4.the 22nd letter of the Roman alphabet