The Dictionary of Dreams: 15,000 Meanings Interpreted gives you all the tools, symbols, and their true meanings, to translate our cryptic nightly images. Dreams can be fun and adventurous, but also frightening and distorted, and still again, they can be an endless combination of both. From spitting teeth out (a sign of aging), to creepy, crawly spiders (a sign that one feels like an outsider), dreams can mean much more to us once we learn how to decipher their hidden meanings.