Chiefly US. A person who hunts game, especially deer, at night by using a spotlight to illuminate or dazzle the hunted animal; a person who engages in spotlighting.
Origin
Early 20th century (in an earlier sense). Partly from spotlight + -er.
Definition of spotlighter in US English:
spotlighter
nounˈspɒtlʌɪtə
Chiefly US. A person who hunts game, especially deer, at night by using a spotlight to illuminate or dazzle the hunted animal; a person who engages in spotlighting.
Origin
Early 20th century (in an earlier sense). Partly from spotlight + -er.