The definitions provided in the MEERA glossary cover only the material presented in MEERA, but not necessarily the terms you may find in the resources that are linked to MEERA.  If you come across an EE or evaluation term that is not in the MEERA glossary, the following glossaries may be of use: 

Center for Program Evaluation Glossary
Bureau of Justice Assistance. (2006).    
This comprehensive glossary covers the terms most likely to be found in evaluation documents and literature. 

Glossary of Program Evaluation Terms
The Joint Committee on Standards for Educational Evaluation. (1994).  From The Program Evaluation Standards, Sage.
This is another relatively thorough glossary of terms likely to be found in evaluation literature.  Definitions are brief and simple.

Online Evaluation Resource Library Glossary
National Science Foundation.  (2006).
This useful, but less comprehensive glossary provides easy-to-understand definitions of evaluation terms divided into three categories: evaluation plan components, instrument characteristics, and evaluation report components. 

Definitions Project
National Association for Interpretation. (2007).
The Definitions Project provides a variety of definitions for common terminology used by environmental educators, interpreters, and many others in nonformal settings.  While its focus is not on evaluation, the terminology may nevertheless be useful for those looking to evaluate their programs.