Word.ws English Dictionary

pack-year

pack-year noun: a unit of measure for estimating the number of cigarettes a person has previously smoked, equivalent to average number of packs (each containing 20 cigarettes) smoked per day multiplied by the number of years the person has smoked.

Noun

pack-year (plural pack-years, abbreviation PY or py)

  1. A unit of measure for estimating the number of cigarettes a person has previously smoked, equivalent to average number of packs (each containing 20 cigarettes) smoked per day multiplied by the number of years the person has smoked.

Forms of pack-year

pluralpack-years
abbreviationPY
abbreviationpy
alternative formpack year

Origin of pack-year

Compound of pack + year.

Questions about pack-year

What does pack-year mean?
Pack-year means a unit of measure for estimating the number of cigarettes a person has previously smoked, equivalent to average number of packs (each containing 20 cigarettes) smoked per day multiplied by the number of years the person has smoked.
What part of speech is pack-year?
Pack-year is a noun.
What is the plural of pack-year?
The plural of pack-year is pack-years.

Words near pack-year in the dictionary

  1. pack-trains
  2. pack-up
  3. pack-up kit
  4. pack-up kits
  5. pack-ups
  6. pack-year
  7. pack-years
  8. packa
  9. packability
  10. packable
  11. packables

Source and license

Adapted from Wiktionary: pack-year (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “pack-year.” Word.ws, https://word.ws/pack-year. Based on Wiktionary, CC BY-SA 4.0.