definition of
j

[1] #1 j n. [joule, J, watt second] a unit of electrical energy equal to the work done when a current of one ampere passes through a resistance of one ohm for one second. wn

[2] #2 j n. [J] the 10th letter of the Roman alphabet. wn

[3] #3 j n. [J] the 10th letter of the Roman alphabet. wn