boulevard UK /ˈbuː.ləˌvɑːd/US /ˈbʊ.lə.vɑɹd/ noun4 •A broad, well-paved and landscaped thoroughfare.We live on Sunset Boulevard. •The landscaping on the sides of a boulevard or other thoroughfare. •A strip of land between a street and sidewalk. •The grassy area in the middle of some streets; a refuge island. formsboulevards