Turn Up Meaning

Example :   Is this your pencil that turned up in my drawer?  I don't like people turning up without an appointment.1922, James Joyce, Ulysses Episode 16  Highly providential was the appearance on the scene of Corny Kelleher when Stephen was blissfully unconscious but for that man in the gap turning up at the eleventh hour the finis might have been that he might have been a candidate for the accident ward...  Turn up the radio and sing along.  He turned up his collar against the cold.  Turn up the main halyard.