The Glossary of Mental Health Diagnoses & Commonly Used Terms


We invite you to explore the Belongly mental health glossary. Below, please find definitions for commonly used terms..

Please keep in mind that many people define these terms in different ways. If you feel we’ve inaccurately defined a term, or you have a suggested update, Please use our update form to submit your correction.


A severe dread of locations known as agoraphobia, a form of anxiety disorder, can make a person feel confined, helpless, terrified, or ashamed.
We all have lapses of memory from time to time. We may have a hard time focusing, completing tasks, or staying still.
Although “antisocial” has come to mean someone who avoids social situations, adding the term “personality disorder” changes the meaning completely.
When confronted with a stressful or difficult situation, it’s perfectly normal to feel anxious. Going to a job interview or giving a speech in front of a large crowd can cause a lot of anxiety in people.
What is the phobia of spiders? For those of you who aren’t familiar, arachnophobia is a severe, often irrational phobia of spiders.


Symptoms of bipolar disorder, formerly known as manic-depressive disorder or manic depression, can be severe and long-lasting.
Movie and television stereotypes have played a large role in shaping our perceptions of what an eating disordered person looks like.
As a result of having borderline personality disorder, an individual is plagued by erratic mood swings and unstable feelings.
Many people get nervous or anxious or feel shy in social situations from time to time. For these people, however, the anxiety is short lived and doesn’t interfere with life or fuel their avoidance of


As part of our daily routine, we often find ourselves stuck in traffic, going through a revolving door, or trying on clothes in a dressing room.


Everyone experiences feelings of melancholy or hopelessness at times, but when those feelings become persistent, intense, and make it hard to function through day-to-day life


Picking at one’s skin while distracted can be a problem for some people. It’s possible that they’ll randomly pop a pimple or scab that’s especially troubling.


When it comes to certain people in your life, you can never have too much of their attention. People who are “dramatic” or “theatrical” have a tendency to do anything to keep the attention on themselves.


The mental illness of narcissistic personality disorder (NPD) is one of many varieties. Those with NPD may come across as superior with an inflated opinion of themselves
Nosophobia’s Greek origin is a combination of “nosos,” meaning disease, and “phobos,” meaning fear.


People with obsessive compulsive disorder (OCD) suffer from distressing, recurring thoughts and images (obsessions) that drive them to engage in compulsive behaviours (compulsions) in an effort to alleviate or eliminate the intrusive thoughts.


Impacting between 2-4 percent of the population, paranoid personality disorder (PPD) is a group of conditions that involve odd or eccentric ways of thinking. Deemed a “Cluster A” personality disorder
An estimated 1.5% of adults in the United States suffer from persistent depressive disorder, also known as dysthymic disorder.
Post-traumatic stress disorder (PTSD) is a psychiatric disorder that may occur in people who have experienced or witnessed a traumatic event. PTSD can affect anyone of any age group.
The time after you have a baby is supposed to be a time of joy and happiness. Congratulations! Your long-awaited bundle of joy has arrived


While many people have heard of borderline personality disorder (BPD), a lesser-known and more difficult to treat condition is quiet borderline personality disorder (quiet BPD) (quiet BPD).


No one likes rejection – it doesn’t matter if it comes from friends, family, coworkers, or a crush. Others, on the other feeling, are unable to move on from rejection without experiencing


Schizophrenia is a chronic brain disorder that is frequently misunderstood. It’s characterised by thoughts or experiences that seem out of touch with reality
Schizotypal personality disorder is characterised by persistent, out-of-character patterns of eccentric behaviour. Individuals suffering from this disorder are generally loners who prefer
Also called seasonal depression, seasonal affective disorder (SAD) is a mental health condition marked by feelings of depression and meaninglessness that occur at roughly the same time
Many people get nervous or anxious or feel shy in social situations from time to time. For these people, however, the anxiety is short lived and doesn’t interfere with life or fuel their avoidance of


Everyone has fears, but some affect their mental health more than others. Are you frightened of being near or in large bodies of water? Does this fear of deep ocean and other vast, deep bodies
Sometimes the fear of dying can turn into an irrational fear. The notion that we will one day no longer exist can be so crippling for some people that it begins to interfere with their daily quality of
In what way do the tiny bubbles in your morning coffee make you feel when you look at a honeycomb? Or when you see a spotty animal? For the most part, we’re not affected by


It’s estimated that 1.35m people are killed in traffic accidents every year. That’s nearly 3,700 every day. Despite the fact that vehophobia, an intense and irrational fear of driving, isn’t one of

Submit A Correction Or Addition

See something wrong with one of our glossary terms?  Want to submit a term not currently in our Glossary?  We welcome any contributions. Please use the form below to submit your update.