This is the 10103rd most frequent Spanish word.
celebrarían
"Would celebrate."
In this conditional sentence, 'celebrarían' expresses a hypothetical action that would occur under certain conditions.
Ellos celebrarían su cumpleaños si estuvieran aquí.
They would celebrate their birthday if they were here.
Here, 'celebrarían' is used to indicate a reported event that is scheduled to happen in the future.
Dijeron que celebrarían su victoria mañana.
They said they would celebrate their victory tomorrow.
This sentence uses 'celebrarían' to describe a potential future action dependent on another condition.