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to thin out

to thin out

4 3.5
Become fewer and more spread out
  • phrasal verb
  • /θɪn aʊt/
translation icon : disminuir
  • After lunch, the number of customers in the cafe started to thin out, and the atmosphere became quieter.
  • crowds thin out
  • traffic thins out
  • trees thin out

Examples

  • The traffic moved a few feet, then seemed to start thinning out.

    Fiction book (1996)
  • After a while, traffic thinned out, and they drove by the station again.

    Fiction book (2002)
  • Eventually, the stream of animals began to thin out, and we knew it was nearly over.

    Fiction book (1994)
  • Come on over and have a look when this crowd thins out.

    Fiction book (2002)
  • The number of houses thinned out as the bus climbed the mountain slope.

    Fiction book (2002)
  • Around him, the crowd is thinning out as men trot in to apply for their respective jobs.

    Fiction book (1994)
  • Once past the airport, the traffic thinned out and the green of the parkway enveloped them.

    Fiction book (2001)
  • The long parade of students thins out as it passes the Heights business section with its sandwich shops and candy stores.

    Fiction book (2002)
  • When Cory and Nat went downstairs again with their drawings, the crowd had thinned out a bit.

    Fiction book (1996)
  • The forest had begun to thin out; Lucian glimpsed high crags in the distance, and Joy-in-the-Dance headed straight toward them.

    Fiction book (1995)

Synonyms

to dwindle
vsto thin out
72 5.1

To become smaller or less in number over time

does not emphasize a slow or continuous decrease
to thin
vsto thin out
38 1.4

To become less thick or crowded, for example a crowd

focuses more on concentration or strength rather than count or density
to drop off
vsto thin out
21 3.5

To become less in number or amount

is narrower, referring mainly to density or numbers not quality
to fall away
vsto thin out
19 4.3

To become less in amount or quality

is more specific to loss in density or numbers than general decline
to peter out
vsto thin out
9 5.6

To slowly become weaker and then stop

does not imply a final end or disappearance
to taper off
vsto thin out
9 4.5

To become smaller or weaker over time until it stops

does not imply an eventual stop or disappearance
to dwindle away
vsto thin out
1 4.6

Slowly get smaller in number or amount until nothing remains

does not stress total disappearance as strongly as the linked sense
to dwindle down
vsto thin out
1 5.1

To become slowly smaller or less until almost nothing remains

does not suggest near total disappearance as strongly as the linked sense
to rarefy
vsto thin out
  • Specialized
9.9

To make air or other things thinner so they have more empty space

is used more in everyday speech rather than scientific contexts

Antonyms

35 2.3

Become or make something less runny

How Dense

to thin out
4 3.5
to spread out
89 2.8

Surface Forms

thin out infinitive
thinned out past participle
thinning out present participle
thins out third person singular

Morphology

thin + out

The verb 'thin' (to make less dense) combined with the particle 'out' produces a meaning that is directly inferable — to make fewer or more sparsely distributed — following a common English verb + particle composition. This compositional pattern is cross-linguistically common and would be understandable to a B1 learner who knows both constituents.

Etymology

The verb thin out paints a simple picture: as people leave, the group becomes more spread out and looks thin. So it means 'to become fewer or less crowded'.