[ mon-uh-foh-bee-uh ]
/ ˌmɒn əˈfoʊ bi ə /
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an irrational or disproportionate fear of being alone.
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Origin of monophobia

First recorded in 1880–85; mono- + -phobia
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022


What does monophobia mean?

Monophobia is the abnormal fear of being alone.

Some people have phobias, which are ”fears associated with specific objects or activities.” These abnormal (unusual) fears are typically considered irrational (not based on reason) because the object of the fear isn’t usually harmful. Often, these fears are formed around a traumatic event.

Monophobia is different from separation anxiety, but the two are sometimes discussed alongside each other.

Example: My monophobia makes it difficult for me to take trips alone.

Where does monophobia come from?

The first record of the word monophobia in English comes from the late 1800s. It is made up of the root mono-, meaning “single” or “alone,” and -phobia, from a Greek word meaning “fear.” It follows the same pattern as many words for specific phobias, such as arachnophobia (fear of spiders).

Monophobia is characterized by feelings of fear and anxiety about being alone. This can happen even if there are people somewhat nearby, perhaps even in the next room. Sometimes the fear is based on the possibility that something bad will happen when one is alone.

Separation anxiety disorder may have similar symptoms, but is typically more severe.

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What are some other forms of monophobia?

  • monophobic (adjective)

What are some words that share a root or word element with monophobia

What are some words that often get used in discussing monophobia?

How is monophobia used in real life?

Monophobia is most often used in a serious, clinical way, especially in discussions of psychological conditions.


Try using monophobia!

Is monophobia used correctly in the following sentence?

Some people like being alone, but when you have monophobia, it can cause crippling anxiety.

British Dictionary definitions for monophobia

/ (ˌmɒnəʊˈfəʊbɪə) /

a strong fear of being alone

Derived forms of monophobia

monophobic, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for monophobia

[ mŏn′ō-fōbē-ə ]

An abnormal fear of being alone.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.