Princeton's WordNet

1. population(noun)

   the people who inhabit a territory or state

   "the population seemed to be well fed and clothed"

2. population(noun)

   a group of organisms of the same species inhabiting a given area

   "they hired hunters to keep down the deer population"

3. population, universe(noun)

   (statistics) the entire aggregation of items from which samples can be drawn

   "it is an estimate of the mean of the population"

4. population(noun)

   the number of inhabitants (either the total number or the number of a particular race or class) in a given place (country or city etc.)

   "people come and go, but the population of this town has remained approximately constant for the past decade"; "the African-American population of Salt Lake City has been increasing"

5. population(noun)

   the act of populating (causing to live in a place)

   "he deplored the population of colonies with convicted criminals"

Kernerman English Learner's Dictionary

1. population(noun)ˌpɒp yəˈleɪ ʃən

   the number of people or animals in a place

   The population of this country has decreased over the last ten years.; population control

2. populationˌpɒp yəˈleɪ ʃən

   all the people in a place

   The majority of the population cannot read or write.

Wiktionary

1. population(Noun)

   The people living within a political or geographical boundary

   The population of New Jersey will not stand for this!

2. population(Noun)

   A count of the number of residents within a political or geographical boundary such as a town, a nation or the world.

3. population(Noun)

   A collection of organisms of a particular species, sharing a particular characteristic of interest, most often that of living in a given area

   A seasonal migration annually changes the populations in two or more biotopes drastically, many twice in opposite senses

4. population(Noun)

   A group of units (persons, objects, or other items) enumerated in a census or from which a sample is drawn

5. population(Noun)

   The act of filling initially empty items in a collection.

   John clicked the Search button and waited for the population of the list to complete.

Origin: From populatio, as if a noun of action from Classical populus.

Webster Dictionary

1. Population(noun)

   the act or process of populating; multiplication of inhabitants

2. Population(noun)

   the whole number of people, or inhabitants, in a country, or portion of a country; as, a population of ten millions

Freebase

1. Population

   A population is a summation of all the organisms of the same group or species, who live in the same geographical area, and have the capability of interbreeding. In ecology the population of a certain species in a certain area is estimated using the Lincoln Index. The area that is used to define a sexual population is defined as the area where inter-breeding is potentially possible between any pair within the area. The probability of interbreeding is greater than the probability of cross-breeding with individuals from other areas. Under normal conditions, breeding is substantially more common within the area than across the border. In sociology, population refers to a collection of human beings. Demography is a social science which entails the statistical study of human populations. This article refers mainly to human population.

U.S. National Library of Medicine

1. Population

   The total number of individuals inhabiting a particular region or area.

• bevolkingAfrikaans
• سُكّانArabic
• населениеBulgarian
• populaçãoPortuguese (BR)
• obyvatelstvoCzech
• die BevölkerungGerman
• befolkningDanish
• πληθυσμόςGreek
• poblaciónSpanish
• rahvastikEstonian
• جمعیتFarsi
• väkilukuFinnish
• populationFrench
• אוּכלוּסִייָהHebrew
• आबादीHindi
• stanovništvoCroatian
• lakosságHungarian
• pendudukIndonesian
• íbúar; íbúafjöldiIcelandic
• popolazioneItalian
• 人口Japanese
• 인구Korean
• gyventojai, gyventojų skaičiusLithuanian
• iedzīvotāji; iedzīvotāju skaitsLatvian
• jumlah pendudukMalay
• bevolkingDutch
• befolkningNorwegian
• ludnośćPolish
• جمعیت، نفوسPersian
• نفوس، جمعيتPashto
• populaçãoPortuguese
• populaţieRomanian
• населениеRussian
• obyvateľstvoSlovak
• prebivalstvoSlovenian
• populacijaSerbian
• befolkning, folkmängdSwedish
• ประชากรThai
• nüfusTurkish
• 人口，(全體)居民Chinese (Trad.)
• населенняUkrainian
• آباديUrdu
• dân sốVietnamese
• 人口，（全体）居民Chinese (Simp.)