collectionnoun/kəˈlɛkʃən/

• 1

  A set of items or amount of material procured, gathered or presented together.

  • The attic contains a remarkable collection of antiques, oddities, and random junk.
  • The asteroid belt consists of a collection of dust, rubble, and minor planets.
• 2

  entertainmentlifestylemusicA set of pitch classes used by a composer.

  • The "collectional information" one receives is ambiguous since the collection { C, E, F, G, A } occurs in the key of C and in the key of F.
  • In fact, students are often taught that specific collections—diatonic, octatonic, and whole-tone, etc.—typify these composers' compositional language.
• 3

  The activity of collecting.

  • Collection of trash will occur every Thursday.
• 4

  mathematical-analysismathematicssciencesA set of sets; used because such a thing is in general too large to comply with the formal definition of a set.

• 5

  A gathering of money for charitable or other purposes, as by passing a contribution box for donations.

  • The people here are very good to each other, too. When someone's house burned down, when someone was in the hospital, they took up collections for the people.
• 6

  lawDebt collection.

• 7

  obsoleteThe act of inferring or concluding from premises or observed facts; also, that which is inferred.

  • We may safely say thus, that wrong collections have been hitherto made out of those words by modern divines.
• 8

  The jurisdiction of a collector of excise.