1
general::
Also, in the region of. Approximately, about, as in They paid in the neighborhood of a million dollars, or I don't know exactly what the exchange rate is? somewhere in the region of 95 yen to the dollar. The first expression dates from the mid-1800s, the variant from the mid-1900s.
American Heritage Idioms
2
general::
Phrase(s): (somewhere) in the neighborhood of something
Fig. approximately a particular amount or measurement. • I take somewhere in the neighborhood of ten pills a day for my various ailments. • My rent is in the neighborhood of $700 per month.
McGrawhill's American Idioms And Phrasal Verbs