shadow
// noun
UK /ˈʃæd.əʊ/ US /ˈʃæd.oʊ/
1. COUNTABLE NOUN
A shadow is a dark shape on a surface that is made when something stands between a light and the surface.
Synonyms: silhouette // shape // outline // profile
2. UNCOUNTABLE NOUN
Shadow is darkness in a place caused by something preventing light from reaching it.
Synonyms: shade // dimness // darkness // gloom
Collins English Dictionary
