Negro
noun
Ne·gro ˈnē-(ˌ)grō 
plural Negroes
1
dated, often offensive : a person of Black African ancestry
2
dated, often offensive : a member of a group of people formerly considered to constitute a race (see race entry 1 sense 1a) of humans having African ancestry and classified according to physical traits (such as dark skin pigmentation)
Negro adjective dated, often offensive
Negroid
ˈnē-ˌgrȯid
adjective or noun or less commonly negroid
dated, often offensive Negroness
ˈnē-grō-nəs
noun dated, often offensive 
Word History
Etymology
Spanish or Portuguese, from negro black, from Latin nigr-, niger
First Known Use
1555, in the meaning defined at sense 2
Kids Definition
Negro
noun
Ne·gro ˈnē-ˌgrō
plural Negroes
often offensive
: a person of black African ancestry
Hint: In the past, this word was more commonly used and is still used in certain circumstances without offense. However, most people now consider the word offensive.
Geographical Definition
Negro
geographical name
Ne·gro ˈnā-(ˌ)grō
ˈne-
1
river 400 miles (640 kilometers) long in south central Argentina flowing east into the Atlantic
2
river 1400 miles (2253 kilometers) long in eastern Colombia and northern Brazil flowing into the Amazon River
3
river 434 miles (698 kilometers) long in central Uruguay flowing southwest into the Uruguay River