focal point

American  

noun

1. 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.

2. 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.

3. the central or principal point of focus.

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focal point British  

noun

1. 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

2. a central point of attention or interest

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focal point Scientific  

1. The point at which all radiation coming from a single direction and passing through a lens or striking a mirror converges.

2. Also called focus

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Etymology

Origin of focal point

First recorded in 1705–15

Example Sentences

That’s rightly going to be the focal point of Talarico’s campaign.

From Slate • May 30, 2026

The other focal point is a rebel-held city largely cut off from government resources.

From The Wall Street Journal • May 19, 2026

Once more, Becerra was the focal point of attacks, befitting his newfound status as the candidate to beat.

From Los Angeles Times • May 15, 2026

Shi's departure after almost a decade removed a toxic focal point for the fans, but angst against Fosun remains.

From BBC • Apr. 20, 2026

It showed the whole campus, then it zeroed in on the field of portables and the focal point of the sinkhole.

From "Tangerine" by Edward Bloor

Related Words

• center of attention
• centerpiece