What "configurable" means in Apple I purchased a MacBook Pro:

It says that:


  8GB of 1866MHz LPDDR3 onboard memory
  Configurable to 16GB.


What does configurable means here? Can I upgrade the memory to 16GB?
This term configurable refers to the fact that when you order a Mac from Apple you can choose to configure it with more RAM. You cannot do this after purchase yourself, as the RAM is soldered on during the manufacturing process.

Other configurable options when buying a Mac usually include the size and/or type of storage, the processor you wish to have, bundled software, and so on. The choices you get also depend on the model of Mac you purchase.