As a verb:
* Look: "Mira el cielo" (Look at the sky)
* See: "Mira lo que encontré" (See what I found)
* Watch: "Mira la película" (Watch the movie)
As an exclamation:
* Look!: "Mira, un perro!" (Look, a dog!)
* See!: "Mira, ya terminé" (See, I'm finished)
* Hey!: "Mira, ¿qué estás haciendo?" (Hey, what are you doing?)
As a noun:
* Look: This is less common but could be used to refer to an action of looking. "Tu mirada" (Your look)
It's important to consider the surrounding words and the situation to determine the most accurate translation.