- tri·ple-deck·er
- /ˌtrıpəlˈdɛkɚ/ noun, pl -ers [count]: something that has three levels or layers
The bus we rode on was a triple-decker.
— usually used before another nounWe took a tour of London on a triple-decker bus.
a triple-decker sandwich
compare ↑double-decker, ↑single-decker
Useful english dictionary. 2012.