outflow

noun

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

The verdict

“outflow” is a moderately-common English word, ranked #28,655 in English word frequency and used as a noun.

#28,655
frequency rank, English
7
letters
10
tracked misspellings
2
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - The process of flowing out.

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

outflow vs outlaw
71% similar
outflow vs outgrow
71% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for outflow
PropertyValue
Headwordoutflow
LanguageEnglish
Part of speechNoun
Letters7
Frequency rank#28,655
Misspellings tracked10
Confusable pairs2
SourceWiktionary (kaikki.org)

Where “outflow” sits in English frequency

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right). outflow lands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Spelling & Dictionary Insight

The English entry for outflow is 7 letters long, classified as a noun. Corpus data places it at rank #28,655 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 6 distinct senses for this headword, so context determines which meaning a reader should apply.

Our generated misspelling index lists 10 likely wrong-spelling variants for outflow, with forms such as "otuflow", "ouftlow", and "outfflow". Each variant is a distinct typo pattern an edit-distance generator flags, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution. It also participates in 2 confusable-pair relationships, "outlaw", "outgrow", a pairing that trips writers up because the two words share enough sound or shape to blur together.

Etymologically, the entry records: From Middle English outflowen, from late Old English ūtflōwan (attested in the past tense as ūt flēow), equivalent to out- + flow. The noun is derived from the verb. The correct English form is outflow, spelled O-U-T-F-L-O-W.

Definition

  1. 1
    The process of flowing out.
  2. 2
    A fluid that flows out.
  3. 3
    Any outward movement.
  4. 4
    A stream of gaseous material emanating from an active galactic nucleus.
  5. 5
    The part of a system that allows material to flow out.
  6. 6
    Something that flows out of a sewage treatment plant.

Etymology

From Middle English outflowen, from late Old English ūtflōwan (attested in the past tense as ūt flēow), equivalent to out- + flow. The noun is derived from the verb.

Synonyms

This word in other languages

Common misspellings

Also misspelled as: otuflow,ouftlow,outfflow,outfllow,outfloww,outflwo,outfolw,outlfow,outtflow,uotflow

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of outflow - counted as single-character edits (an insertion, a deletion, or a substituted letter). The larger the bar, the easier the typo is to spot; one-edit slips are the ones that sneak past readers.

otuflow2ouftlow2outfflow1outfllow1outfloww1outflwo2outfolw2outlfow2
Edit distance from "outflow"

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "outflow"?
"outflow" is spelled O-U-T-F-L-O-W.
What does "outflow" mean?
As a noun, "outflow" means: The process of flowing out.
What words are commonly confused with "outflow"?
"outflow" is commonly confused with "outlaw", "outgrow". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
What is the origin of the word "outflow"?
From Middle English outflowen, from late Old English ūtflōwan (attested in the past tense as ūt flēow), equivalent to out- + flow. The noun is derived from the verb. See the full etymology section above for more details.
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.

Using “outflow”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is O-U-T-F-L-O-W - every other letter order is a misspelling in standard orthography.
  • Don't mix it up with “outlaw” - see the side-by-side comparison. outflow vs outlaw
  • Browse more English words and confusable pairs in the same reference. English words
Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

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

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list