Possible Definitions:
1. Saucer (n.) A small pan or vessel in which sauce was set on a table.
2. Saucer (n.) A small dish, commonly deeper than a plate, in which a cup is set at table.
3. Saucer (n.) Something resembling a saucer in shape.
4. Saucer (n.) A flat, shallow caisson for raising sunken ships.
5. Saucer (n.) A shallow socket for the pivot of a capstan.