numero
Numero (noun) means a number, especially used in the phrase "numero uno" to mean the best or the first. Example: “He acted like he was numero uno on the team.”
How to use numero
Learner’s notesIn plain EnglishA borrowed word for "number", almost always seen in the phrase "numero uno" meaning "number one".
Informal and usually used only in the fixed phrase "numero uno".
Fill the gap
Can you complete this real example?
He acted like he was _____ uno on the team.
Etymology
Borrowed from Latin numero, the ablative form of numerus, "number".