a dark area or shape produced by a body coming between rays of light and a surface

trees cast long shadows

used in reference to proximity, ominous oppressiveness, or sadness and gloom

the shadow of war fell across Europe

only one shadow lay over Sally's life

an inseparable attendant or companion

her faithful shadow, a Yorkshire terrier called Heathcliffe

envelop in shadow; cast a shadow over

the market is shadowed by St Margaret's church

a hood shadowed her face

follow and observe (someone) closely and secretly

he had been up all night shadowing a team of poachers