3.10/10 says:

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> If a program attempts to **access** the stored value of an object through a glvalue of other than one of the following types the behavior is undeﬁned:
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> 
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However, the term "access" is not defined anywhere. In this context does it mean *read*, or *read or modify* ?

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In the C standard it is unambiguously defined as *read or modify*. However in C++11 it seems to be used with different meanings at different times, for example:

1.9/8:

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> Access to volatile objects are evaluated strictly according to the rules of the abstract machine.
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> 
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Clearly this is meant to be *read or modify*, however in many other places such as 1.10/24:

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> * access or modify a volatile object, or
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it is used as if it only means *read*.