The `ou’ in the first syllable is like the `oo’ in `cool’, `pool’, and `fool’; the following `e’ is like the `a’ in `china’. The final `ar’ sounds like the `ar’ in `bar’, `par’, and `tar’. In American English, the `ou’ is pronounced like the `u’ in `put’, `pull’, and `full’. In both cases, the stress is on the first syllable.
The word is used to refer to a street or a road that is lined with trees on both sides. In the U.S, however, any broad road can be referred to as `boulevard’.