checkpoint

Short definition from Wiktionary

Noun

1. 1
   A point or place where a check is performed, especially a point along a road or on a frontier where travellers are stopped for inspection.
2. 2
   A situation, often represented by a point in time, at which the state of a database system is known to be valid, and to which it can be returned in the event of a crisis by using a combination of backups and logs; the data stored at this event.
3. 3
   A predetermined point in a map, level or scenario that the player may resume from if they die or restart.
4. 4
   A biological control mechanism ensuring correct progression through the cell cycle.

Verb

1. 1
   To set a checkpoint.