Redefined: The APA Dictionary of Psychology

We’re excited to announce a recent major update to the APA Dictionary of Psychology! Notable as the first content update since the final publication of the print version in 2015, this release features a number of benefits, including

  • revisions of 1,500+ terms related to gender and sexuality; race, ethnicity, and culture; aging and older adulthood; and disabilities and disorders
  • alignment with the APA Inclusive Language Guide and additional APA resources, including removal of binary wording to promote gender inclusivity
  • updated DSM-5-TR diagnostic terminology, and
  • date information for each entry’s most recent update.

With more than 25,000 authoritative entries spanning 90 psychology subfields, this web-based tool is freely available at https://dictionary.apa.org.

Users who access APA PsycArticles on APA PsycNet have integrated access to the dictionary when viewing the HTML version of full-text APA journal articles. Look for the dotted blue underline that links to the dictionary entry.

Definitions are also accessible and highlighted in search engine results. Quickly look up a term from anywhere by typing the word/phrase you want to look up into your browser’s search bar and look for the APA Dictionary in the results.

Screenshot of APA Dictionary of Psychology entry gate-control theory

TIP: Typing dictionary.apa.org or APA Dictionary followed by your desired term into your browser’s search bar may return the APA Dictionary entry as one of the top search results, depending on your search engine (e.g., Googling dictionary.apa.org gate control hypothesis or searching DuckDuckGo for APA dictionary gate control hypothesis returns the APA Dictionary entry for gate-control theory).


The APA Dictionary in Psychology is a landmark reference for terminology in psychology and the behavioral sciences, beginning with its print publication in 2007 and transitioning into an online resource in 2018. To learn more, check out the companion blog post Look up Psychology Terms in the APA Dictionary of Psychology or visit the APA Dictionary to explore on your own!

Patti Avellanet