a singer of torch songs; most often a woman

Having curves in alternate directions; meandering. / Moving gracefully and in a supple manner. / (figuratively) Morally crooked; shifty.

A surname originating as an occupation.

(sewing) A sewing machine of the Singer brand. / A former make of British motor car.

(mathematics) Of a function, associating a unique value of its range with each value of its domain.

In a sincere or earnest manner; honestly. / (US) A conventional formula for ending a letter, used when the salutation addresses the person for whom the letter is intended by his or her name.

(medicine) Pneumonia affecting one lung.

Without specifying a date (for a future event); indefinitely.

A legal wrong that causes no actual damage or injury to anyone.

A component in a device, or a point in a network, that, if it were to fail would cause the entire device or network to fail; normally eliminated by adding redundancy.