To stand over (formerly especially so as to guard or intimidate); to stand higher than or above.
"to be overstanding for honours": to be ineligible for honours in an examination because more than the permitted number of terms (normally twelve) has elapsed since one's matriculation.
To sail past (a line or mark indicating the course of a race) by staying on a tack for too long.
To understand. Now used (especially in Caribbean and African-American usage) to avoid the negative connotations of under, perceived as incompatible with the positive meaning of the verb.
Contrasted with understand in other ways, as: to understand more than is necessary or desirable; to analyse excessively; to understand fully.