Dictionary.com
definitions

defensible

[dih-fen-suh-buhl]
||

adjective

capable of being defended against assault or injury: The troops were bivouacked in a defensible position.
that can be defended in argument; justifiable.

Origin of defensible

1250–1300; Middle English < Late Latin defēnsibilis, equivalent to Latin defēns(us) (see defense) + -ibilis -ible; replacing Middle English defensable < Old French < Late Latin defēnsābilis, equivalent to defēnsā(re) (frequentative of dēfendere to defend) + -bilis -ble
Related formsde·fen·si·bil·i·ty, de·fen·si·ble·ness, nounde·fen·si·bly, adverbnon·de·fen·si·bil·i·ty, nounnon·de·fen·si·ble, adjectivenon·de·fen·si·ble·ness, nounnon·de·fen·si·bly, adverbun·de·fen·si·ble, adjectiveun·de·fen·si·ble·ness, nounun·de·fen·si·bly, adverb

Synonyms for defensible

2. suitable, fit, tenable, allowable, warrantable.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for defensibility

Historical Examples of defensibility

  • But its defensibility was practically all the crag fort had to offer by way of attraction.

    Rung Ho!

    Talbot Mundy

  • Mr. Tallmadge's desire not to be interrupted in the act might have enlightened him as to its defensibility; but he was no casuist.

    The Open Question

    Elizabeth Robins

  • In ordinary villages the flat-roofed shielings are huddled together without plan or defensibility.

  • The defensibility of the site as well as the fertility of the soil pointed it out as the best place for the seat of government.

British Dictionary definitions for defensibility

defensible

adjective

capable of being defended, as in war, an argument, etc
Derived Formsdefensibility or defensibleness, noundefensibly, adverb
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 defensibility

defensible

adj.

late 13c., from Old French defensable, from Late Latin defensibilem, from Latin defens-, past participle stem of defendere (see defend).

Online Etymology Dictionary, © 2010 Douglas Harper