noun
corridor, pace, gait
B1
Gang (der) primarily means 'corridor' (a passage in a building) and also 'pace' or 'gait' (how someone walks). Noun with plural Gänge (Umlaut). Declension: nominative singular der Gang, plural die Gänge. No special preposition; multiple senses depend on context. Formal and colloquial uses differ.
Examples
Der Gang im alten Haus ist sehr schmal.
The corridor in the old house is very narrow.
Das Abendessen besteht aus drei Gängen.
Dinner consists of three courses.
Als die Gäste spät ankamen, führte der Portier sie den langen Gang entlang, damit sie schnell ihr Zimmer erreichen konnten.
When the guests arrived late, the porter led them down the long corridor so that they could reach their room quickly.
Details
Mnemonics
Imagine walking down a narrow corridor (a 'gang' of people walking in line)
Think of English 'gangway' → corridor
der — imagine a male (der) guard standing in the corridor
Notes
Gang is a polysemous noun: common meanings are 'corridor' (architecture) and 'pace/gait' (movement). Plural is irregular (Gänge). In compounds (e.g., 'Eingang', 'Ausgang') it keeps similar meaning related to access or movement.