You'll already know hora as time from the basic question ¿Qué hora es? What's the time?, or as people often ask in Mexico: ¿Me da su hora?It has other uses in this meaning.
Spanish: ¿A qué hora llega? English: What time is he arriving?
Spanish: Nunca llega a la hora. English: He never arrives on time.
Spanish: Ha llegado la hora de descansar. English: The time has come to rest.
And of course, another basic meaning is hour:
Spanish: Me ha llevado horas hacerlo. English: It took me hours to do it.
Spanish: El vuelo dura dos horas y media. English: The flight lasts two and a half hours.