Definition of mulatto in US English:

mulatto

nounPlural mulattos, Plural mulattoes

dated, offensive
  • A person of mixed white and black ancestry, especially a person with one white and one black parent.

Origin

Late 16th century: from Spanish mulato ‘young mule or mulatto’, formed irregularly from mulo ‘mule’.

Pronunciation

mulatto

/m(y)o͝oˈlädō//m(j)ʊˈlɑdoʊ/