Boyd’s Bible Dictionary:
A mythical creature, half man, half goat, inhabiting woods and waste places
(Isa. 13:21; 34:14).
Concise Bible Dictionary:
The word is sair, which signifies “hairy one,” and hence a “he goat.” It is translated “goat” and “kid” many times. In Leviticus 17:7 and 2 Chronicles 11:15 it is translated “devils,” but would have been better “demons,” referring to the gods which the heathen unconsciously worshipped (compare 1 Cor. 10:20). The word is translated “satyr” in Isaiah 13:21 and Isaiah 34:14, both passages referring to places brought to utter desolation, so that they are inhabited by wild beasts, owls, and perhaps “wild goats” are intended; or that the desolation would be such that men would shun them as if haunted by unearthly beings. Such a dread is often expressed by dwellers in the East.
Jackson’s Dictionary of Scripture Proper Names:
a demon (in he-goat form, or as bristling with horror) Saul, requested