1. to call (someone) to (the door, phone, etc.), to tell (someone) to come, to call up (on the phone), to summon, to page, to invoke (e.g. a spirit)

Godan verb with 'su' ending transitive verb

2. to invoke (e.g. a subroutine), to call, to open (e.g. a file)

transitive verb Godan verb with 'su' ending computing