Abstaining from marriage; the state of being unmarried. / (by extension) Abstinence from sexual relations.

(music) A harpsichord.

A mobile phone using cellular technology. / (informal) A mobile phone using any technology (such as PCS).

(historical) A member of one of the ancient peoples of Western Europe called Celtae by the Romans. / A member of one of the (modern, Celtic) peoples who speak Celtic languages. (Compare Gael.)

The overhead closure of a room. / The upper limit of an object or action. / (aviation) The highest altitude at which an aircraft can safely maintain flight.

present participle of ceil

(idiomatic) An unwritten, uncodified barrier to further promotion or progression, in employment and elsewhere, for a member of a specific demographic group.

A branch of the Indo-European languages that was spread widely over Western and Central Europe in the pre-Christian era. / Any of several sports teams. See Wikipedia for a list.

Of or relating to the Celts.

A European herb (Apium graveolens) of the carrot family. / (uncountable) The stalks of this herb eaten as a vegetable. / A yellow-green colour, like that of a celery.