E. Cobham Brewer 1810–1897. Dictionary of Phrase and Fable. 1898.
Rider.
An addition to a manuscript, like a codicil to a will; an additional clause tacked to a bill in parliament; so called because it over-rides the preceding matter when the two come into collision.
1
“Perhaps Mr. Kenneth will allow me to add the following as a rider to his suggestion.”—Notes and Queries, “M.N.”
