pop.

noun
  1. 1

    The people living within a political or geographical boundary.

    โ€œThe population of New Jersey will not stand for this!โ€

  2. 2

    (by extension) The people with a given characteristic.

    โ€œIndia has the third-largest population of English-speakers in the world.โ€

  3. 3

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

    โ€œThe townโ€™s population is only 243.โ€

  4. 4

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

    โ€œA seasonal migration annually changes the populations in two or more biotopes drastically, many twice in opposite senses.โ€

  5. 5

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

  6. 6

    The act of filling initially empty items in a collection.

    โ€œJohn clicked the Search button and waited for the population of the list to complete.โ€

Source: https://en.wiktionary.org/wiki/pop., https://en.wiktionary.org/wiki/population