adjective, se·cur·er, se·cur·est.

verb (used with object), se·cured, se·cur·ing.

verb (used without object), se·cured, se·cur·ing.

to be or become safe; have or obtain security.
  1. to cover openings and make movable objects fast: The crew was ordered to secure for sea.
  2. to be excused from duty: to secure from general quarters.

Origin of secure

1525–35; < Latin sēcūrus carefree, equivalent to sē- se- + cūr(a) care (see cure) + -us adj. suffix; cf. sure
Related formsse·cur·a·ble, adjectivese·cure·ly, adverbse·cure·ness, nounse·cur·er, nouno·ver·se·cure, adjective, verb (used with object), o·ver·se·cured, o·ver·se·cur·ing.o·ver·se·cure·ly, adverbpre·se·cure, verb (used with object), pre·se·cured, pre·se·cur·ing.qua·si-se·cure, adjectivequa·si-se·cure·ly, adverbre·se·cure, verb, re·se·cured, re·se·cur··per·se·cure, adjectivesu·per·se·cure·ly, adverbsu·per·se·cure·ness, nounun·se·cure, adjectiveun·se·cure·ly, adverbun·se·cure·ness, nounwell-se·cured, adjective

Synonyms for secure

1. protected. See safe. 2. stable, fast, fixed. 7. confident. 10. gain. See get. 11. protect, guard, safeguard. 12. assure, guarantee.

Antonyms for secure

1. unsafe. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for unsecure

Contemporary Examples of unsecure

  • The gun and ammunition was unsecure and easily accessible, including to Galen [Victoria and Dennis' six year old daughter].

    The Daily Beast logo
    Explosive Hopper Divorce Doc

    Jacob Bernstein

    January 25, 2010

  • I also located a loaded shotgun, unsecure, in our bedroom closet.

    The Daily Beast logo
    Explosive Hopper Divorce Doc

    Jacob Bernstein

    January 25, 2010

British Dictionary definitions for unsecure



free from danger, damage, etc
free from fear, care, etc
in safe custody
not likely to fail, become loose, etc
able to be relied on; certaina secure investment
nautical stowed away or made inoperative
archaic careless or overconfident


(tr) to obtain or get possession ofI will secure some good seats
(when intr, often foll by against) to make or become free from danger, fear, etc
(tr) to make fast or firm; fasten
(when intr, often foll by against) to make or become certain; guaranteethis plan will secure your happiness
(tr) to assure (a creditor) of payment, as by giving security
(tr) to make (a military position) safe from attack
nautical to make (a vessel or its contents) safe or ready by battening down hatches, stowing gear, etc
(tr) nautical to stow or make inoperativeto secure the radio
Derived Formssecurable, adjectivesecurely, adverbsecurement, nounsecureness, nounsecurer, noun

Word Origin for secure

C16: from Latin sēcūrus free from care, from sē- without + cūra care
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for unsecure

1630s, from un- (1) "not" + secure (adj.).



1530s, "without care, dreading no evil," from Latin securus, of persons, "free from care, quiet, easy," also in a bad sense, "careless, reckless;" of things, "tranquil; free from danger, safe," from *se cura, from se "free from" (see secret (n.)) + cura "care" (see cure (n.)).

In English, of places, "free from danger, unexposed," from 1580s. Meaning "firmly fixed" (of material things) is from 1841, on notion of "affording grounds for confidence." Of telephones, "not wiretapped," from 1961. Replaced Middle English siker, from Old English sicor, from the Latin word. Related: Securely.



c.1600, "to make safe," from secure (adj.). Meaning "ensure, make certain" is from 1650s; that of "seize and hold" is from 1640s; sense of "get possession" is from 1743. Related: Secured; securing.

Online Etymology Dictionary, © 2010 Douglas Harper