The Oxford Dictionary of Music states that "generally it implies a specially personal or tender quality".

The Skeptic's Dictionary states that apports reported during seances are likely the result of magic tricks.

The Oxford Dictionary of Islam states that, "the minimum duration of the contract should be at least three days".

The Grove's Dictionary of Music and Musicians published in 1920 stated that more than 1000 teachers had received certificates.

The Oxford English Dictionary states that its first instance in British Latin is from 1272.

The Oxford English Dictionary states that the origins are uncertain, but that perhaps it is a corruption of the word recruit.

The Dictionary of American Surnames additionally states that the name may derive from ortega: "black grouse."

The venerable Oxford English Dictionary states that an earthquake is specifically a convulsion of the earth's surface caused by volcanic forces.

The Oxford English Dictionary states that the term skiffle means "rent party", indicating the informality of the occasion.

The Oxford English Dictionary states that the word is a redoubling of boogie, which was used for rent parties as early as 1913.