lowpass

adj

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

The verdict

“lowpass” is uncommon English (outside the top frequency list), classed as an adjective. The kind of spelling people second-guess.

Unranked
below top-frequency English
7
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Describing a filter, circuit, or system that rejects or attenuates a frequencies above a specified value while passing those be.

Corpus desk

Index EN-lowpass · lowpass · English

lowpass · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-LONG 7 letters
  • VOW-2 2 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "L" 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 lowpass
PropertyValue
Headwordlowpass
LanguageEnglish
Part of speechAdjective
Letters7
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “lowpass” in English

lowpassfalls 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

lowpass is uncommon English outside the top frequency list, classed as anadjective. Rarity is why readers land here mid-draft. Gloss: "Describing a filter, circuit, or system that rejects or attenuates a frequencies above a specified value while passing those be.".

Our edit-distance generator produced no likely misspellings for lowpass, typically a sign the spelling maps closely to how the word sounds. Our confusable-pair dataset has no match for it, which typically means the spelling is too distinctive to be mistaken for another word.

Etymologically, the entry records: From low + pass. The correct English form is lowpass, spelled L-O-W-P-A-S-S.

Definition

  1. 1
    Describing a filter, circuit, or system that rejects or attenuates a frequencies above a specified value while passing those be.

Recorded use

Wiktionary example

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

  1. From the “highpass-lowpass” filter, “bandpass-bandreject” filter, or the flat amplifier, the signal, after suitable amplification with adjustable gain, may be fed to a meter which gives the root mean square value of the voltage, …

Etymology

From low + pass.

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 "lowpass"?
"lowpass" is spelled L-O-W-P-A-S-S.
What does "lowpass" mean?
As an adjective, "lowpass" means: Describing a filter, circuit, or system that rejects or attenuates a frequencies above a specified value while passing those be.
What is the origin of the word "lowpass"?
From low + pass. 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.

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

Source: FrequencyWords open word-frequency list