1. A numbered main or principal road

Encyclopedia: A road

• transmittal
• transmittance
• transmitted
• transmitter
• transmitting
• transmitting aerial
• transmogrification
• transmogrify
• transmontane
• transmundane
• transmutability
• transmutable
• transmutation
• transmute
• transnational
• transoceanic
• transom
• transom window
• transonic
• transorbital lobotomy
• transpacific
• transparence
• transparency
• transparent
• transparent gem