1.A person who is riding or who can ride a horse, bicycle, motorcycle, etc.
‘two riders approached the cottage'
‘she was a skilled rider '
‘Christopher had dreams of becoming a professional motorbike rider and had been riding since the age of five.'
‘He is into motorbikes and is going to be a professional dirt bike rider .'
‘Motorcyclists did acrobatic tricks like bareback horse riders of old.'
2.A condition or proviso added to something already agreed.
‘one rider to the deal—if the hurricane heads north, we run for shelter'
‘There is a rider to that, which is ‘and to help them be the best that they can be'.'
‘The rider called the Dorgan Amendment would have made it illegal for the U.S. to spend money enforcing the travel ban.'
‘She attached a rider to a bill, which would have withheld money the department needed to implement the regulation.'
‘So if need be, yes, there could be a rider on their appropriation bill that no money should be expended by the FCC to administer the Powell rule.'
3.An addition or amendment to a bill at its third reading.
4.A recommendation or comment added by the jury to a judicial verdict.
‘a rider was also added: the question of liability was dependent upon the purpose of the disclosure'
‘No evidence was called on their behalf, and when convicting the jury added this rider .'
‘A rider handed in by the jury indicated a failing of the prison service in its duty of care to the deceased, which rider the coroner refused to append to the inquisition.'
‘At his inquest the jury added a rider to its verdict urging further research into Roaccutane and its side-effects.'
‘The committee was forced to add a number of riders to this verdict, however.'
5.A supplementary clause in a performer's contract specifying food, drink, etc., to be provided.
‘What sort of stygian rider clauses did the Air contract contain?'
‘Diet Coke is asked for, by name, in contract riders from a wide variety of artists, ranging from Michael W. Smith to Nine Inch Nails.'
‘It was much better to eat at the hotel and bung it on room service than suffer backstage food which was so rank that within the next decade bands wised up and put riders in their contracts specifying what they wanted.'
‘His rider states that before every performance the promoter must provide a physician to inject him with a Vitamin B12 shot.'