(biblical) A word occurring between verses or paragraphs in parts of the Hebrew Bible, namely in Habakkuk and the Psalms; perhaps indicating a pause, either for contemplation or for clearing the throat in singing.
[…] Ps[alm] xlvi has three Selahs (vs. 3, 7, 11,) and likewise a repetition in vs. 7, 11, which, as we have already fully illustrated, Selah greatly intensifies. In Ps. xlix there are two Selahs (vs. 13, 15,) indicating the refrain, "Hear this, all ye people; give ear, all ye inhabitants of the world:" and, also, a repetition, (with some variation,) of the following words, "Nevertheless man being in honor abideth not: he is like the beasts that perish." Vs. 12, 20.
noun
(Christianity) A pause or rest of a contemplative nature.