United State Courts Glossary
http://www.uscourts.gov/Common/Glossary.aspx

The People’s Law Dictionary
http://dictionary.law.com/

Glossary of Terms Used in Legal Research, Thomson Reuters Westlaw
http://bit.ly/1a4N3dA

WEX, Cornell’s Legal Information Institution’s community-built, freely available legal dictionary and legal encyclopedia
http://www.law.cornell.edu/wex/