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split second

split second

43 2.5
A very short moment when something happens
  • noun
  • /splɪt ˈsɛkənd/
translation icon : instante
  • He made a decision in a split second when the opportunity arose.

I wore them for like a split second and now they're gone.

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Examples

  • 'And there's always a moment that you'll need' to make a split second decision.

  • And it's under these conditions that you're gonna be forced to make split-second decisions that could cost you your life.

  • But there was this split second when I knew that this was my chance.

  • I had a split second to decide whether you were going to attack my partner or your kid was gonna reach for his gun.

  • I remember the split second I became obsessed with that.

  • I made a split-second decision.

  • Then lightning struck, and for a split second, everything was like daytime.

    Fiction book (1993)
  • "Lucia took her eyes off the highway for a split second to look at her brother."

    Fiction book (1990)
  • I paused, but only for a split second, and then we continued to take those notions apart.

    Academic text (2014)
  • He just looked at me, kind of frowned for the split second, kissed me and then left.

Synonyms

moment
vssplit second
1.0

A very short time or a particular point in time

is more focused on extreme brevity than this broader term
second
vssplit second
  • Informal
543 1.0

A very short time

is the figurative colloquial phrase for an extremely shorter interval
instantly
vssplit second
330 1.0

Right away without any delay

focuses on the short duration itself rather than the lack of delay
instant
vssplit second
232 1.0

A very short moment that passes quickly

is the common everyday phrase for that extremely brief period
flash
vssplit second
72 1.3

A very short time

is the ordinary word for a short span without sudden image
heartbeat
vssplit second
  • Informal
72 3.7

A very short time

is the plain name for the same very short span without bodily image
in the blink of an eye
vssplit second
  • Informal
50 3.3

Very quickly, in almost no time

is the plain term for the same short span without imagery
momentarily
vssplit second
47 3.7

For a very short time

expresses the brief interval itself rather than temporary action
in a flash
vssplit second
  • Informal
35 2.5

Very quickly in a single moment

focuses on the short time itself rather than sudden action
blink of an eye
vssplit second
  • Informal
35 2.8

A very short moment that passes almost instantly

is the neutral phrase for the same very short time without bodily image
millisecond
vssplit second
26 2.5

A unit of time equal to one thousandth of a second

is the colloquial phrase for a brief span, not an exact measurement
instantaneously
vssplit second
25 5.6

Happen at once without delay

names the brief time span rather than the immediacy of action
wink
vssplit second
  • Informal
22 4.9

A very short time like a moment

is the ordinary expression for the same short span without the gesture
nanosecond
vssplit second
  • Specialized
20 4.5

A unit of time equal to one billionth of a second

is a vague everyday phrase for a very short period, not a precise measure
jiffy
vssplit second
  • Informal
17 7.2

A very short time, just a moment

is a more neutral phrase for the same brief stretch
microsecond
vssplit second
  • Specialized
11 3.6

A very short time equal to one millionth of a second

is the informal way to indicate a small time span without precision
twinkling
vssplit second
8 2.5

A very short moment of time

is the plain expression for the same tiny span without imagery
jiff
vssplit second
  • Informal
8 9.9

A very short time

is the neutral wording for the same short interval without slang
New York minute
vssplit second
  • Informal
5 7.2

A very short moment when something happens

states the same tiny span in ordinary language without the joke
nano
vssplit second
  • Informal
3 5.5

A very short time equal to one billionth of a second

is the everyday nontechnical way to name a very short span
trice
vssplit second
  • Informal
1 9.9

A very short time, like an instant

is the standard everyday phrase for that same short period
half a mo
vssplit second
  • UK
1 9.6

A very short time, like a few moments

is the neutral expression for the same brief span without slang
picosecond
vssplit second
  • Specialized
1 8.0

A very short time equal to one trillionth of a second

is the general casual phrase for a very short period, not technical
in an eyeblink
vssplit second
  • Informal
6.8

Happen very quickly in the short time it takes to blink an eye

is the neutral phrase for the same short span without the image
in the snap of someone's fingers
vssplit second
  • Informal
5.0

Happens very quickly

names the short time itself rather than the dramatic action
subnanosecond
vssplit second
  • Specialized
9.6

A time interval shorter than one nanosecond, about one billionth of a second

is the everyday phrase for a short period, not technical or measured

How Short

blink of an eye
  • Informal
35 2.8
split second
43 2.5
instant
232 1.0
moment
1.0
while
1.0

Surface Forms

split second singular
split seconds plural

Morphology

split + second

The meaning 'an extremely short moment' is directly derivable from combining 'split' (to divide, very small or broken) with 'second' (a moment), i.e. a 'divided/very small second' = a very brief time. This modifier + time-unit composition is common and cross-linguistically transparent, so a B1 learner who knows the constituents would likely infer the meaning.

Etymology

The phrase split second comes from the image of a second being split in two, so the moment becomes very tiny. That's why it means 'an extremely short moment'.