This is the 6592nd most frequent Spanish word.
casimiro
"Casimiro" does not have a direct definition in Spanish; it is typically a proper noun, used as a male given name.
Here, 'Casimiro' is used as a proper noun, specifically a name.
Casimiro siempre llega temprano a las reuniones.
Casimiro always arrives early to meetings.
In this sentence, 'Casimiro' is colloquially personified to represent drowsiness or the act of feeling sleepy.
El evento fue tan aburrido que todos comenzaron a sentir el hechizo de Casimiro.
The event was so boring that everyone began to feel the spell of drowsiness.
'Casimiro' is used as a fictional character's name here, within a literary or theatrical context.