thin out

verb

"thin-out" is a 7-letter English headword indexed on PlainSpell.

The verdict

“thin out” is uncommon English (outside the top frequency list), classed as a verb. The kind of spelling people second-guess.

Unranked
below top-frequency English
8
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - To make sparse; to remove some of a group of newly-planted plants in order to allow the remaining ones to grow unimpeded.

Corpus desk

Index EN-thin-out · thin out · English

thin out · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-LONG 8 letters
  • VOW-3 3 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "T" thin
  • PHOTO-UNK Peer pending

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Key facts for thin out
PropertyValue
Headwordthin out
LanguageEnglish
Part of speechVerb
Letters8
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “thin out” in English

thin outfalls outside the top-100,000 ranked English words, the long-tail zone of technical, archaic, or low-frequency vocabulary, exactly where readers second-guess spellings most.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

thin out is uncommon English outside the top frequency list, classed as averb. Rarity is why readers land here mid-draft. 2 senses are on record.

The misspelling generator found no plausible variants for thin out, a sign its spelling follows regular English conventions. We don't track a confusable pairing for this entry, since its spelling is unusual enough that it doesn't cluster with a lookalike.

Wiktionary doesn't record an etymology for this headword, so its spelling is easiest to reason about phoneme by phoneme, absent a documented history. The correct English form is thin out, spelled T-H-I-N- -O-U-T.

Definition

  1. 1
    To make sparse; to remove some of a group of newly-planted plants in order to allow the remaining ones to grow unimpeded.
  2. 2
    To become sparse.

Recorded use

Wiktionary examples

These source excerpts show how thin out appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. And later on, when the crowd thinned out / I was just about to do the same / She was standing there in back of my chair / Said to me, "Don't I know your name?"
  2. “Abandon Starbucks!” screamed a member of the staff, and his colleagues immediately stopped making coffees or bagging muffins and ran for their lives “It seems to be thinning out a little, ” announced Mr. Stink

This word in other languages

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "thin out"?
"thin out" is spelled T-H-I-N- -O-U-T.
What does "thin out" mean?
As a verb, "thin out" means: To make sparse; to remove some of a group of newly-planted plants in order to allow the remaining ones to grow unimpeded.
What language does "thin out" come from?
"thin out" is a English word. You can look up definitions, pronunciations, and spelling data for this and other words across English, Spanish, Portuguese, French, and German on PlainSpell.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list