Things are not clearly defined.

He has a defined chin.

And in my own life, in this country, and as President, I have learned that our identities do not have to be defined by putting someone else down, but can be enhanced by lifting somebody else up. They don’t have to be defined in opposition to others, but rather by a belief in liberty and equality and justice and fairness.

From the viewpoint of tissue culture, the environment for this experiment should be more rigidly defined.

In chemistry, the molar mass of a chemical compound is defined as the mass of a sample of that compound divided by the amount of substance in that sample, measured in moles.

Americans tend to feel so defined by their choices that having an abundance of options can make the weight of each decision, no matter how insignificant, feel more burdensome.

Don't you see that the whole aim of Newspeak is to narrow the range of thought? In the end we shall make thoughtcrime literally impossible, because there will be no words in which to express it. Every concept that can ever be needed, will be expressed by exactly one word, with its meaning rigidly defined and all its subsidiary meanings rubbed out and forgotten.

A flood can be defined as the encroachment of water in an area or region which is usually dry.

Vectors need not correspond to a physical quantity; anything can be a vector space as long as vector addition and scalar multiplication is defined.

In most countries, with the exception of the Arab countries and Israel, Saturday and Sunday are defined as the weekend.