come to pass; "What is happening?"; "The meeting took place off without an incidence"; "Nothing occurred that seemed important";
disappear gradually; "The pain eventually passed off";
disregard; "She passed off the insult";
cause to be circulated and accepted in a false character or identity; "She passed the glass off as diamonds"; "He passed himself off as a secret agent";
be accepted as something or somebody in a false character or identity; "She passed off as a Russian agent";