inside-the-Beltway adjective4 •(US) within the portions of Washington D.C., Maryland and Virginia encircled by Interstate 495 (the Washington Beltway) •(US) of or relating to things that occur in Washington, D.C., usually in relation to United States national politics. •(New-Zealand) of or relating to New Zealand politics in the capital city of Wellington, New Zealand. •(US, disapproving) out of touch with the sentiments of people living outside of Washington, D.C.; elitist, insular