We are calling to 'confirm your appointment' with Dr. Jones. = We are calling to make sure that you will 'keep your appointment' with Dr. Jones.
The museum is open to visitors 'by appointment' only. [=you have to make an appointment to visit the museum]
The court ordered the 'appointment' of an attorney to represent the child.
(..) I offered him posterior intimacy. Okay, let's just... E-everyone calm down. The court reporter will still his quill. On hands and knees I begged him. He said he had an early appointment. Witch! Witch! Press her between stones! SHEPHERD (OVER P.A.): Attention, Griffins. Could Peter Griffin please (..)2020 TvShow: Family Guy Title: Movin' In (Principal Shepherd's Song) Season: 18 Episode 20