Md. Code, Transportation § 11–110

(a) “Conviction” means:

(1) A final conviction, even if the penalty is refunded, suspended, or probated;

(2) An unvacated forfeiture of collateral deposited to secure a defendant’s appearance in court;

(3) A plea of nolo contendere accepted by the court; or

(4) The payment of a fine.

(b) “Conviction” does not include a finding of probation on a stay of entering judgment.