The Bua Luang Compact Wysiwys English-Thai Dictionary   BUY!

Thaicouses.com comments:
The best pocket Thai language tourist dictionary I have encountered; it betters most bulkier works. Includes both Thai script and an excellent, well-documented transliteration system, with tone markings. A joy. Highest recommendation.

Thai-English Dictionary  

Thaicouses.com comments:
Published in 1944, this definitive reference work has now been superceeded by many superior and more up-to-date works. Many usages and definitions are archaic, and a lot of space is given to arcane minutae. Like Haas' large dictionary, this one is essential for a serious student, until one becomes more able to use native-Thai dictionaries.

Thai-English English-Thai Dictionary for Non-Thai Speakers, Revised Edition  

Thaicouses.com comments:
Companion to the excellent language course (see below).

Robertson's Practical English-Thai Dictionary  

Thaicouses.com comments:
Although widely distributed and recommended, I find this pocket dictionary not as complete as Bua Luang. There are a few useful appendicies including "Telling Time," "Classifiers," and "Yes and No."

The Oxford-Duden Pictorial Thai & English Dictionary   BUY!

Thaicouses.com comments:
Good picture dictionary with alphabetical Thai and English cross-reference lists. Many of the over 30,000 listings are specialized terms of use only to the advanced student.

Thai-English Student's Dictionary  

Thaicouses.com comments:
De facto standard reference for most serious students.

Thai-English/English-Thai Dictionary and Phrasebook (Dictionary and Phrasebooks)  

Thaicouses.com comments:
I cannot recommend this book since it doesn't have any Thai script. The Thai-English part is basically useless unless you dedicate yourself to this book's particular transliteration scheme.

Thai (Hippocrene Handy Dictionaries)   BUY!

Thaicouses.com comments:
Useful English-to-Thai dictionary since it includes the defined word in several contexts. The Thai script is not given, however.