Definitions
1.NounAn applied material; an application
2.NounA line at right angles to the axis of a conic section that extends from the axis to the curve
3.NounThe z-coordinate (the last of the three terms by which a point is referred to, in a system of Cartesian coordinates for a three-dimensional space)
4.VerbTo apply (a material to a surface).
5.AdjectiveApplied or put to some use.