ON-RAMP Meaning of ON-RAMP in English /on"ramp', awn"-/ , n.an entrance lane for traffic from a street to a turnpike or freeway. Also, onramp . Cf. off-ramp . [ by analogy with OFF-RAMP ] Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012