This is the 2782nd most frequent Spanish word.
monitor
A monitor is a screen or device used for observation or supervision, or a person who oversees or assists.
In this sentence, 'monitor' means a person serving as a guide or leader in a classroom setting.
El monitor de la clase ayudó a los estudiantes con sus tareas.
The class monitor helped the students with their assignments.
In this sentence, 'monitor' refers to a hardware device used to display visual output from a computer.
Compré un nuevo monitor para mi computadora.
I bought a new monitor for my computer.
Here, 'monitor' is used to mean an electronic device that displays monitoring data or visuals.