avocadoav‧o‧ca‧do /ˌævəˈkɑdoʊ, ˌɑ-/ noun (plural avocados) [countable, uncountable]Word Origin a firm green fruit with thick dark skin, used in guacamole [Origin: 1600–1700 Spanish aguacate “avocado,” from Nahuatl ahuacatl “testicle, avocado;” influenced by Spanish avocado “lawyer”]