gateway : Idioms & Phrases
gateway drug
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noun a habit-forming drug that is not addictive but its use may lead to the use of other addictive drugs
- one college athlete recently called beer a gateway drug for young people
WordNet
gateway to the west
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noun the largest city in Missouri; a busy river port on the Mississippi River near its confluence with the Missouri River; was an important staging area for wagon trains westward in the 19th century
St. Louis; Saint Louis.