simple past tense and past participle of co-sign

An unclear message, often contradicting a situation.

plural of sign-post

Alternative spelling of signpost

(US, telephony) An audible signal to the calling party that indicates failure to complete the requested connection; an engaged tone

A dactylological sign language used in seven different countries, based on Old French Sign Language. ISO 639-3 code: fsl.

(education) A word that a learner recognizes, or is expected to recognize, on sight.

plural of sight word

The form of the Greek letter sigma used in Medieval Greek and occasionally in Greek Orthodox Church transcriptions: ϲ.

The form of the Greek letter sigma only ever used as the last letter of a word: ς.