a hint or faint, indistinct image or idea; intimation: shadows of things to come.
8.
a mere semblance: the shadow of power.
9.
a reflected image.
10.
(in painting, drawing, graphics, etc.)
a.
the representation of the absence of light on a form.
b.
the dark part of a picture, especially as representing the absence of illumination: Rembrandt's figures often emerge gradually from the shadows.
11.
(in architectural shades and shadows) a dark figure or image cast by an object or part of an object upon a surface that would otherwise be illuminated by the theoretical light source. Compare shade(def. 16).
12.
a period or instance of gloom, unhappiness, mistrust, doubt, dissension, or the like, as in friendship or one's life: Their relationship was not without shadows.
13.
a dominant or pervasive threat, influence, or atmosphere, especially one causing gloom, fear, doubt, or the like: They lived under the shadow of war.
14.
an inseparable companion: The dog was his shadow.
15.
a person who follows another in order to keep watch upon that person, as a spy or detective.
Origin: before 900; (noun) Middle English sch(e)adew(e), schadow, shadw(e), Old English scead(u)we, oblique case of sceadushade; (v.) Middle English; Old English sceadwian to protect, cover, overshadow, derivative of the noun; compare Old Saxon skadowan, skadoian,Gothic -skadwjan
late O.E. sceadwian "to protect as with covering wings" (cf. also overshadow), from the root of shadow (n.). Meaning "to follow like a shadow" is from c.1600 in an isolated instance; not attested again until 1872.