This glossary gives many succinct, cross-referenced definitions as well as a bibliography, picture gallery and a few notes on the origin of terms. Some references are linked to journal articles in the JSTOR archive.
Glossaries of Economic Terms in International Economics
Published by Ralph Nader's nonprofit consumer-rights organisation, Public Citizen, this is the PDF version of a booklet dating from 1996. In 18 pages, it explains acronyms and basic concepts related to Free Trade Agreements, and gives advice on reading and interpreting trade agreement documents.
Hundreds of items of "WTO" speak: terms related to international trade and to the World Trade Organisation specifically, from "ad valorem tariff" to "zeroing". Short definitions without further links.