To call to mind (something) for some purpose.
To appeal for validation to a (notably cited) authority.
To cause (a program or subroutine) to execute.
To solicit, petition for, appeal to a favorable attitude.
To conjure up with incantations.
To bring about as an inevitable consequence.
To call upon (a person, a god) for help, assistance or guidance.
To make (someone or something) no longer noble
Not noble; ignoble; base.
Of a metal, being at the lower end of the electrochemical series, i.e. oxidising readily.