Horse
In Ezekiel 26:11, this signifies the love of learning or intellectual things. (Arcana Coelestia 3727)
In Revelation 6:2, this signifies the love of understanding the Word. (Apocalypse Revealed 298)
In Zechariah 12:4, this signifies that the intellectual should be filled with falsities. (Arcana Coelestia 2383[2])
In general, 'a horse' signifies knowledge or understanding of the Word. In an opposite sense it signifies the understanding of the Word falsified by reasonings, and likewise destroyed from self-derived intelligence. 'A dead horse' signifies no understanding of truth from the Word.
Ezekiel 27:27
27
Your riches, and your wares, your merchandise, your mariners, and your pilots, your repairers of ship seams, and the dealers in your merchandise, and all your men of war, who are in you, with all your company which is in the midst of you, shall fall into the heart of the seas in the day of your ruin.
