focal point
Americannoun
-
focal points
plural
-
Also called principal focus. Optics. either of two points on the axis of a mirror, lens, or other optical system, one point being such that rays diverging from it are deviated parallel to the axis upon refraction or reflection by the system and the other point being such that rays parallel to the axis of the system converge to the point upon refraction or reflection by the system.
-
the point at which all elements or aspects converge; center of activity or attention.
The focal point of our discussion was the need for action.
-
the central or principal point of focus.
noun
-
Also called: principal focus. focus. the point on the axis of a lens or mirror to which parallel rays of light converge or from which they appear to diverge after refraction or reflection
-
a central point of attention or interest
-
The point at which all radiation coming from a single direction and passing through a lens or striking a mirror converges.
-
Also called focus
Other Word Forms
Noun Inflected Forms
Etymology
Origin of focal point
First recorded in 1705–15
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The annual red crab migration, when millions of the crustaceans emerge from the forest and scramble to the ocean, is one focal point.
From The Wall Street Journal ● Aug. 22, 2026
She earned another All-Star selection while serving as the focal point of the Sparks’ offense.
From Los Angeles Times ● Aug. 2, 2026
An estimated 60,000 people from Morocco are believed to have crossed into the North African enclave that has long been a focal point for migrant attempting to reach Europe.
From BBC ● Jul. 31, 2026
Ceuta, on Morocco's northern coast, has long been a focal point for migrants attempting to reach Europe.
From BBC ● Jul. 30, 2026
The last two will be the focal point of the curriculum.
From "The Freedom Writers Diary" by The Freedom Writers
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
