An open-top bus has no roof, so that the people sitting on the top level can see or be seen more easily. An open-top car has no roof or has a roof that can be removed.
He took me and my friend Cynthia to the movies in an open-topped car.
The team drove through the streets of Leeds city centre in an open-top bus.
open-top in British English
(ˈəʊpənˌtɒp) or open-topped (ˈəʊpənˌtɒpt)
adjective
not having a roof or having a detachable roof
a tour on the open-top bus
Examples of 'open-top' in a sentence
open-top
These days that sort of result would be cause for an open-top bus parade.
The Sun (2008)
The team finishing fourth will have an open-top bus parade.
Times, Sunday Times (2012)
For our open-top bus parade the streets were packed.
The Sun (2009)
We had to do an open-top bus tour.
The Sun (2008)
Which is entirely as it should be in an open-top car.
Times, Sunday Times (2010)
Rain is apt to make an open-top car look like a poor choice.
Times, Sunday Times (2012)
He also has an invitation to a glorious lap of the town in an open-top bus.
Times, Sunday Times (2008)
There was an open-top roof deck on the hotel and the weather was pleasant.
Times, Sunday Times (2012)
Few experiences in life can deliver the simple pleasure of driving an open-top sports car on an open road under a cloudless sky.
Times, Sunday Times (2006)
A good way to tour the city is by open-top red bus.
The Sun (2010)
The Shrews will today take to the town for an open-top bus parade.
The Sun (2012)
So when's the open-top bus parade?
Times, Sunday Times (2014)
We're thinking more along the lines of an open-top bus tour and a commemorative stamp issue.
Times, Sunday Times (2007)
Enjoy the open-top bus tour, the pats on the back and the free drinks.
The Sun (2008)
Thousands cheered and waved flags as they drove through Cologne in an open-top car.
The Sun (2015)
The question was: who would go first on the open-top buses?
Times, Sunday Times (2014)
Countless more are ready to descend on the airport and the capital to welcome them home to an open-top bus parade on Friday.
Times, Sunday Times (2016)
The game will kick off weeks of celebrations in the city, including an open-top bus parade and a victory rally in a local park.