A statement that contains only constants and no variables

To assume a humble tone. / To not say anything; to keep quiet. / To play a minor part. / (singing, obsolete) To sing softly.

plural of single life

(insurance) Describing a life insurance policy that insures a single individual's life.

(insurance) The life assured under a single life contract.

Alternative spelling of sinkhole

(medicine, colloquial) Sinus tachycardia.

(medicine, colloquial) Sinus bradycardia.

plural of single-serving site

(Internet) A simple website consisting of a single page, with a dedicated domain name, that does only one thing.