Sr.

adj

"sr" is a 2-letter English headword indexed on PlainSpell.

The verdict

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

Unranked
below top-frequency English
3
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Abbreviation of senior A title used after a father's name when his son is given the same name.

Corpus desk

Index EN-sr · Sr. · English

Sr. · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MID 3 letters
  • VOW-0 0 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 Sr.
PropertyValue
HeadwordSr.
LanguageEnglish
Part of speechAdjective
Letters3
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “Sr.” in English

Sr.falls 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

Sr. is uncommon English outside the top frequency list, classed as anadjective. Rarity is why readers land here mid-draft. Gloss: "Abbreviation of senior A title used after a father's name when his son is given the same name.".

Sr. doesn't appear in our generated misspelling index, since its letter sequence doesn't invite the usual edit-distance slips. This entry stands alone in our confusable dataset, since nothing in our dataset looks or sounds close enough to cause mix-ups.

This entry's etymology isn't recorded, leaving phoneme-to-grapheme mapping as the best guide to its spelling rather than a borrowing history. The correct English form is Sr., spelled S-R-..

Definition

  1. 1
    Abbreviation of senior A title used after a father's name when his son is given the same name.

Recorded use

Wiktionary examples

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

  1. John Doe Sr.
  2. Ronaldo Sr., who is the record goalscorer in men’s international soccer with 136 goals for Portugal, congratulated his son on his Instagram Stories by posting a picture of his name on the squad list, saying: “Proud of you, son!”

Synonyms

the ElderFather

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 "Sr."?
"Sr." is spelled S-R-..
What does "Sr." mean?
As an adjective, "Sr." means: Abbreviation of senior A title used after a father's name when his son is given the same name.
What language does "Sr." come from?
"Sr." 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