What does acrophobia mean?
Acrophobia is an intense, persistent, and irrational fear of heights. Unlike ordinary wariness near a ledge or a tall building, it produces anxiety that is disproportionate to any real danger and can trigger dizziness, sweating, panic, and complete avoidance of elevated places such as bridges, balconies, ladders, or glass floors. The word derives from the Greek 'akros,' meaning 'highest' or 'at the point,' combined with '-phobia,' meaning fear. It belongs to the family of specific phobias recognized in clinical psychology and is often cited as one of the most widespread, alongside fears of spiders and enclosed spaces. In everyday usage the term carries a slightly clinical register; most speakers simply say they are afraid of heights. Related forms include 'acrophobe,' for a person with the condition, and the adjective 'acrophobic.' Because the fear can be genuinely disabling, the word is useful both in medical discussion and in vivid descriptive writing about human vulnerability.
nounAn extreme or irrational fear of heights.
- An extreme or irrational fear of heights.
"Her acrophobia made the glass-floored observation deck an ordeal she would never repeat."
"His acrophobia was so severe that he avoided even standing on a stepladder."
"The documentary follows climbers who conquered their acrophobia to scale El Capitan."
Rarely pluralized, since the condition is typically discussed in the singular; a plural may appear when comparing different individuals' experiences.
"Therapists treat acrophobias of varying severity, from mild unease to total paralysis on stairs."
The word comes from the Greek 'akron' meaning 'peak' or 'highest point' — so acrophobia is literally a fear of summits.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of acrophobia
Acrophobia was coined in the late nineteenth century from Greek roots: 'akros,' meaning 'highest' or 'topmost,' and '-phobia,' from 'phobos,' meaning fear. It joined a family of modern coinages built on the same combining form, such as hydrophobia and claustrophobia, which were being systematically formed during that era. The root 'akros' also underlies words like 'acronym' and 'acropolis,' all pointing to something at its peak or outermost point.
Related word forms
How acrophobia is actually used
Acrophobia is a formal, clinical-sounding term; in everyday speech people more often say simply 'a fear of heights.' It is classified among specific phobias and is considered one of the most common. It should not be used loosely to mean ordinary caution at height — the term implies fear that is excessive and irrational.
Easily confused with acrophobia
Vertigo is a sensation of spinning or dizziness that can have many causes, whereas acrophobia is specifically a persistent, irrational fear of heights.