- Conceptual meaning and Operational meaning - Conceptual terms/meanings are based on what a dictionary or an encyclopedia tells. - On the other hand, Operational terms/meanings are based on how the researchers used a term on their study. - The terms should be arranged alphabetically and should be defined lexically and/or operationally.

A formal definition consists of three parts: The term (word or phrase) to be defined The class of object or concept to which the term belongs The differentiating characteristics that distinguish it from all others of its class

Terms defined should be arranged in alphabetical order and acronyms should always spell out fully most specially if it is used for the first time and not commonly known. Make sure to define though common may have special meaning or used differently. Complicated and lengthy definition should be included in your appendix.