abschließen

Verb

 * 1) to end, to finish or complete one's studies, a task
 * 2) to shut off
 * 3) to lock; to seal off
 * 4) to conclude (a contract, a deal), to finalise/finalize (a contract, an agreement)

Usage notes

 * Before the 1996 German spelling reform, the past tense was conjugated as schloß ab, schlossest/schloßt ab, schloß ab, schlossen ab, schloßt ab, schlossen ab, while the reformed spellings use schloss- consistently.