selah

Selah \Se"lah\, n. [Heb. sel[=a]h.] (Script.) A word of doubtful meaning, occuring frequently in the Psalms; by some, supposed to signify silence or a pause in the musical performance of the song. [1913 Webster] Beyond the fact that Selah is a musical term, we know absolutely nothing about it. --Dr. W. Smith (Bib. Dict.) [1913 Webster]