E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Oyer and Terminer (Courts of)
are general gaol deliveries, held twice a year in every county. Oyer is French for to heari.e. hear in court or try; and terminer is French for to conclude. The words mean that the commissioners appointed are to hear and bring to an end all the cases in the county.