Monique Wittig and Sande Zeig, Lesbian Peoples. A wonderful dictionary/novel.

The Dictionary of the Khazars by Milorad Pavić was another novel told in dictionary entries.

Joanna Russ did a fabulously funny story told entirely in sentences from a space traveler's phrase book. "Useful Phrases for the Tourist" was the title. Oh God, I am so sorry she is dead.