| a sandwich, typically on three slices of toast, interlaid with pieces of cold chicken or turkey and bacon or ham and containing lettuce, tomato, mayonnaise, etc. |
[three-dek-er] 
| 1. | any ship having three decks, tiers, etc. |
| 2. | (formerly) one of a class of sailing warships that carried guns on three decks. |
| 3. | a sandwich made of three slices of bread interlaid with two layers of filling; club sandwich. |
| 4. | something having three layers, levels, or tiers. |
əlˈdɛk