Nikon 18-140mm vr dx.
nikon calls this the af-s dx nikkor 18-140mm f/3.5-5.6g ed vr.
af-s: silent wave autofocus motor, also called swm.
dx: won't work well on 35mm or fx cameras.
nikkor: nikon's brand name for all their lenses.
g: gelded for cost-reduction and removing compatibility with older cameras.
ed: magic extra-low dispersion glass for reduced secondary chromatic aberration.
vr: vibration reduction.
also has:
d: couples distance information to the matrix meter.
aspherical: specially-shaped glass for greater sharpness.