/ ˈbuːləvɑːd; NAmE ˈbʊləvɑːrd/ noun
1.
( BrE ) a wide city street, often with trees on either side
2.
( abbr. Blvd. ) ( NAmE ) a wide main road (often used in the name of streets) :
Sunset Boulevard
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WORD ORIGIN
mid 18th cent.: French , a rampart (later a promenade on the site of one ), from German Bollwerk from Middle Low German and Middle Dutch bolwerk ; related to bole and work .