A Plain-Language Glossary of Mental Health Terms

Why Mental Health Vocabulary Matters

Mental health conversations are happening more openly than ever — in workplaces, schools, and everyday life. But the terminology can still feel like a foreign language. Words like dissociation, schema, or dialectical pop up in articles, therapy sessions, and social media, often without explanation.

Having a working vocabulary isn't about becoming a clinician. It's about feeling less lost during a first therapy appointment, understanding a diagnosis, or simply following a conversation with someone you care about. Language is the foundation of access.

This glossary covers the terms you're most likely to encounter, defined in plain English. Think of it as a starting point — the same way a reference like health insurance terminology helps you decode your benefits, this guide helps you decode mental health conversations.

Core Mental Health Terms Defined

The following definitions cover conditions, therapies, and concepts you'll encounter most frequently. They're organized to build on one another — understanding trauma makes dissociation easier to grasp, and understanding psychotherapy gives context to specific approaches like CBT or DBT.

If you're trying to understand which type of professional offers which kind of care, our article on therapy, counseling, and psychiatry explains the key distinctions in practical terms.

Putting the Terms Into Context

Knowing a word is different from knowing how it applies to real life. Here are a few ways these terms connect:

• Anxiety vs. an anxiety disorder: Feeling anxious before a job interview is normal. An anxiety disorder involves anxiety that is disproportionate, hard to control, and persistent enough to interfere with daily functioning.
• Therapy type vs. therapist type: CBT and DBT are approaches a therapist may use. Psychiatry refers to a medical specialty. Many therapists are trained in multiple approaches.
• Coping strategies vs. treatment: Coping strategies help manage day-to-day stress but are not a substitute for professional care when a clinical condition is present.

If you're new to all of this and wondering where to begin, Your First Steps Toward Better Mental Health offers grounded, practical starting points. And for daily habits that support mental wellness over time, explore healthy habits more broadly.

This article is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified mental health or healthcare professional with questions about your own mental health.