Definition of invariable in US English:



  • 1Never changing.

    ‘disillusion was the almost invariable result’
    • ‘This development was important because the rule was meant to be invariable, such that it constituted absolutely reliable support for the proving of the thesis proposition.’
    • ‘The invariable result is a loss of quality and the increasing difficulty of including foreign authors in the publishers' programmes.’
    • ‘Then he would come home, and Saturday lunch would be some kind of special event, which included, as its invariable dessert, suet pudding with golden syrup and custard.’
    • ‘With the almost invariable practice of boiling vegetables with its consequent loss of vitamins, the practice of providing fresh fruit with the meal would have much to recommend it.’
    • ‘The results are invariable light, crisp and as tempting as food could possibly be, and the whole experience far less traumatic than I imagined.’
    • ‘These weren't just statistics, I was led to believe, but invariable truths.’
    • ‘The invariable response, when you tell a child that the celebrities have been submerged in mud and entombed with rats, is ‘Why?’’
    • ‘The invariable result is always supposed to be mass unemployment, industry collapse, and economic meltdown - until someone points out reality.’
    • ‘Working on that invariable response, and the number of cricket fans in the country, there must have been three to four million spectators there that amazing day.’
    • ‘They have denied the distinction between higher and lower, to the invariable advantage of the latter.’
    • ‘Side effects (from both free drug and free marine antibody protein) will be the invariable result.’
    • ‘These details are not mentioned by the Gospels, but are an invariable feature of every icon of the Nativity.’
    • ‘On the Central Coast, cooks season well-marbled beef with salt and garlic, sizzle it over local red-oak coals and serve it with the invariable trinity of garlic bread, stewed local pinquito beans and tomato salsa.’
    • ‘If we expect that human character is an elusive and variable thing, then we cannot expect to catch it in a stiff and invariable style.’
    • ‘How did their fossil remains get sorted into an invariable order in the earth's strata?’
    • ‘The second was the invariable denial that followed - the outright refutation of indisputable evidence, or the protestations of innocence or ignorance, or the imputation that supplements had been spiked or contaminated.’
    • ‘Clade strengths were evaluated by analyzing 250 bootstrap replicates with the PROML program based on a model comprising one invariable plus four categories.’
    • ‘It isn't just an occasional failure, it's an invariable failure.’
    • ‘It's staying focussed for long periods of time and the invariable effects on posture, concentration and sense of wellbeing.’
    • ‘One of the hard, invariable, and maddening unofficial rules of parenting, is that you pay for what you get.’
    unvarying, unchanging, changeless, unvaried, invariant
    View synonyms
    1. 1.1Grammar (of a noun in an inflected language) having the same form in both the singular and the plural, e.g., sheep.
      • ‘It consists, just as Esperanto, of completely invariable blocks that combine without restriction.’
    2. 1.2Mathematics (of a quantity) constant.
      • ‘The null hypothesis tested in this study, then, was the proportion of invariable sites model plus either site-specific or gamma-distributed rate variation.’
      • ‘The fundamental constants are an extensive set of invariable quantities, such as the charge of the electron, which scientists use to predict a very wide range of phenomena.’
      • ‘Thus, the flux of water vapour at a constant concentration gradient across pores of invariable geometry will depend only on the molecular characteristics of the gas (solvent).’


Late Middle English: from French, or from late Latin invariabilis, from in- ‘not’ + variabilis (see variable).