seisin

noun

"seisin" is a 6-letter English headword indexed on PlainSpell.

The verdict

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

Unranked
below top-frequency English
6
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - An entitlement to a freehold estate with a right to immediate possession.

Corpus desk

Index EN-seisin · seisin · English

seisin · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-LONG 6 letters
  • VOW-3 3 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "S" 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 seisin
PropertyValue
Headwordseisin
LanguageEnglish
Part of speechNoun
Letters6
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “seisin” in English

seisinfalls 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

seisin is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. 3 senses are on record.

seisin doesn't appear in our generated misspelling index, since its letter pattern doesn't lend itself to common typo substitutions. It is not paired with a close-neighbour confusable in our dataset, suggesting its spelling stands apart enough that readers rarely confuse it with something else.

Etymologically, the entry records: From Middle English seisin, seysen, from Old French seisin, from the verb seisir, from Early Medieval Latin sacīre, from the same Proto-Indo-European root as Gothic 𐍃𐌰𐍄𐌾𐌰𐌽 (satjan) and Old English settan. More at seize, seise. The correct English form is seisin, spelled S-E-I-S-I-N.

Definition

  1. 1
    An entitlement to a freehold estate with a right to immediate possession.
  2. 2
    The act of taking possession.
  3. 3
    The thing possessed; property.

Recorded use

Wiktionary example

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

  1. Diſſeiſin is a large Title, and is an unlawful Entry and Ouſter of him that has an actual Seiſin and Freehold.

Etymology

From Middle English seisin, seysen, from Old French seisin, from the verb seisir, from Early Medieval Latin sacīre, from the same Proto-Indo-European root as Gothic 𐍃𐌰𐍄𐌾𐌰𐌽 (satjan) and Old English settan. More at seize, seise.

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 "seisin"?
"seisin" is spelled S-E-I-S-I-N.
What does "seisin" mean?
As a noun, "seisin" means: An entitlement to a freehold estate with a right to immediate possession.
What is the origin of the word "seisin"?
From Middle English seisin, seysen, from Old French seisin, from the verb seisir, from Early Medieval Latin sacīre, from the same Proto-Indo-European root as Gothic 𐍃𐌰𐍄𐌾𐌰𐌽 (satjan) and Old English settan. More at seize, seise. 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