Douglas Harper's Etymology Dictionary
Wiktionary
a. 1 Lacking a definition or value. 2 (context mathematics computing English) That does not have a meaning and is thus not assigned an interpretation.
WordNet
Wikipedia
In mathematics, the word undefined has several different meanings, depending on the context.
- In geometry, simple words such as "point" and "line" are taken as undefined terms.
- In arithmetic, some arithmetic operations are called "undefined". Two of the more famous examples are division by zero and zero to the power of zero.
- In algebra, a function is said to be "undefined" at points not in its domain. For example, in the real number system, $f(x)=\sqrt{x}$ is undefined for negative x, i.e., no such values exist for function f.
Undefined refers to something that lacks definition.
Undefined may also refer to:
Usage examples of "undefined".
If he could get us to say that some unknown, undefined being had slipped the assignment into our hands without our knowledge, not a doubt remains but that be would immediately discover that we were the purest men on earth.
Unfocused, undefined discomfort resolved into thirstdesert-parched mouth, mummified tongue, scurf like sandstone baked onto the teeth.
And this subconscious, but unintermittent quest for the light that he had never seen left its imprint more and more deeply on his face, in an expression of undefined and tortured effort.
Would Count Lambert plus an undefined balloon made with unspecified and unweighed materials weigh less than five hundred pounds?
As he notes, the Greek word for infinity is apeiron, meaning unbounded, but also undefined, indefinite.
On Tuesday morning the Rosa was loitering at an otherwise undefined spot in the North Sea fifty miles east of Flamborough Head when a thirty-foot cabin cruiser out of the English port of Great Yarmouth approached.
For ever, in all the nations, ascending to the remotest antiquity to which the light of History or the glimmerings of tradition reach, we find, seated above all the gods which represent the luminaries and the elements, and those which personify the innate Powers of universal nature, a still higher Deity, silent, undefined, incomprehensible, the Supreme, one God, from Whom all the rest flow or emanate, or by Him are created.
Tekke Turcomans, of whom we read that they live for plunder only, and that each man of them is entirely independent, acknowledging no constituted authority, but that some among them exercise a tacit and undefined influence over the others.
To be ingenuous, I must own it to be my opinion, that Locke was betrayed into this question by the Schoolmen, who, making use of undefined terms, draw out their disputes to a tedious length, without ever touching the point in question.
His name was Labouise, but he was called Chicot, and was in partnership with Maillochon, commonly called Mailloche, to practice the doubtful and undefined profession of junk-gatherers along the shore.
The practical measures proposed in them -- such as the abolition of the distinction between town and country, of the family, of the carrying on of industries for the account of private individuals, and of the wage system, the proclamation of social harmony, the conversion of the functions of the State into a mere superintendence of production, all these proposals, point solely to the disappearance of class antagonisms which were, at that time, only just cropping up, and which, in these publications, are recognised in their earliest, indistinct and undefined forms only.
The practical measures proposed in them -- -such as the abolition of the distinction between town and country, of the family, of the carrying on of industries for the account of private individuals, and of the wage system, the proclamation of social harmony, the conversion of the functions of the State into a mere superintendence of production, all these proposals, point solely to the disappearance of class antagonisms which were, at that time, only just cropping up, and which, in these publications, are recognised in their earliest, indistinct and undefined forms only.
The practical measures proposed in them - such as the abolition of the distinction between town and country, of the family, of the carrying on of industries for the account of private individuals, and of the wage system, the proclamation of social harmony, the conversion of the function of the state into a more superintendence of production - all these proposals point solely to the disappearance of class antagonisms which were, at that time, only just cropping up, and which, in these publications, are recognized in their earliest indistinct and undefined forms only.
His features were babified: sparse eyebrows and a soft, undefined nose with red dents along the bridge.
The cheeks were still too babyishly round, the features too undefined.