Revision of Definition I changed the Latin translation of this phrase from this for that to something for something which is more accurate and the preferred adaptation into English by three major English dictionaries Here are my sources for three lexicons defining quid pro quo MerriamWebster httpwwwmwcomdictionaryquidproquo American Heritage Dictionary of the English Language httpdictionaryreferencecomsearchqquidproquo The New Dictionary of Cultural Literacy httpwwwbartlebycomquidproquohtml