Plural of decker; people or things that have or work with decks (often used in compounds like 'double-deckers').
From deck + -er (agent/object suffix) + -s (plural). Commonly used in British English to describe double-decker buses or ships with multiple decks.
London's iconic red double-decker buses are 'deckers'—the two-level design lets them carry more people in a city with expensive street space, making geometry actually profitable!
Complete word intelligence in one call. Free tier — 50 lookups/day.