This is the 8860th most frequent Spanish word.
tercero
"Third" (ordinal number) or "third party."
Ordinal number indicating position in a sequence.
Hoy es el tercer día de la semana.
Today is the third day of the week.
Ordinal number used to identify a specific item in a series.
En el tercero a la izquierda, encontrarás el aula.
On the third on the left, you'll find the classroom.
Used to refer to a level or story in a building, typically ellipsis of 'piso' or 'planta'.