Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Not fully grown or developed.
  • adjective Marked by or suggesting a lack of normal maturity: synonym: young.
  • noun An immature animal; a juvenile.

from The Century Dictionary.

  • Not mature or ripe; not complete in growth or development; hence, unfinished; not perfected: as, immature fruit; an immature youth; immature plans or counsels.
  • Coming before the natural time; premature; too early.
  • Synonyms Raw, green, crude, unfinished, undigested.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective Not mature; unripe; not arrived at perfection of full development; crude; unfinished
  • adjective rare Premature; untimely; too early.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective Not fully formed or developed, unripe.
  • adjective Silly or childish in behavior.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective (of birds) not yet having developed feathers
  • adjective not yet mature
  • adjective (used of living things especially persons) in an early period of life or development or growth
  • adjective not fully developed or mature; not ripe
  • adjective characteristic of a lack of maturity

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[Latin immātūrus : in-, not; see in– + mātūrus, mature; see mā- in Indo-European roots.]

Examples

  • He thinks immature will be a big engine for growth. $11 billion has been invested in immature companies.

    Archive 2009-11-01

  • The following recalls have been announced, since a products could be infested with salmonella!, an mam mal that can means critical as well as sometimes deadly infections, especially in immature children, a elderly as well as those with weakened defence systems:

    Items under the peanut recall | In Depth - syracuse.com

  • The following recalls have been announced, since a products could be infested with salmonella!, an mam mal that can means critical as well as sometimes deadly infections, especially in immature children, a elderly as well as those with weakened defence systems:

    Archive 2009-12-01

  • Nassau Candy is recalling twenty-six peanut bulk products since they could be infested with salmonella, an mammal that can means critical as well as sometimes deadly infections, especially in immature children, a elderly as well as those with weakened defence systems.

    Archive 2009-12-01

  • Nassau Candy is recalling twenty-six peanut bulk products since they could be infested with salmonella, an mammal that can means critical as well as sometimes deadly infections, especially in immature children, a elderly as well as those with weakened defence systems.

    Items under the peanut recall | In Depth - syracuse.com

  • He thinks immature will be a big engine for growth. $11 billion has been invested in immature companies.

    Living Blogging AlwaysOn OnDC; Tony Perkins welcomes attendees

  • As much as I like the college world, it has done a huge disservice to many people because it has allowed them to remain immature and irresponsible for longer than people of my parents 'or grandparents' generation.

    Texas Lawmaker Proposes Guns On Campus

  • As for all of you Hillary supporters who threaten to stay home or vote for McCain, again immature and mindless because your anger will hurt all of us – grow up!

    Poll: Obama has edge over McCain

  • And nobody on here cares about your stupid put downs and name calling on TP threads just proves you are under 25 and plain immature!

    Think Progress » Reid to unveil intel oversight legislation at YearlyKos.

  • And nobody on here cares about your stupid put downs and name calling on TP threads just proves you are under 25 and plain immature!

    Think Progress » Reid to unveil intel oversight legislation at YearlyKos.

Comments

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  • "I think if there are allegations based on questions or comments that I made in debate prep about NAFTA or about the continent versus the country when we talk about Africa there, then those were taken out of context, and that is cruel and mean-spirited, it's immature, it's unprofessional, and those guys are jerks," Palin said." (Reuters)

    "Are not!"

    "Are too!"

    "Are not!"

    "Are too. And I call dibs on ending this right now, no take backs! Jerks!"

    November 8, 2008