Meaning

• The central part of fruit, containing the kernels or seeds.

  "the core of an apple or quince"

• The heart or inner part of a physical thing

• The center or inner part of a space or area

  "the core of a square"

• The most important part of a thing; the essence.

  "the core of a subject"

• The portion of a mold that creates an internal cavity within a casting or that makes a hole in or through a casting.

• The bony process which forms the central axis of the horns in many animals.

• Magnetic data storage.

• An individual computer processor, in the sense when several processors (called cores or CPU cores) are plugged together in one single integrated circuit to work as one (called multi-core processor).

  "I wanted to play a particular computer game, which required I buy a new computer, so while the game said it needed at least a dual-core processor, I wanted my computer to be a bit ahead of the curve, so I bought a quad-core."

• The material between surface materials in a structured composite sandwich material.

  "a floor panel with a Nomex honeycomb core"

• The inner part of a nuclear reactor in which the nuclear reaction takes place.

• A piece of ferromagnetic material (i.e. soft iron), inside the windings of an electromagnet, that channels the magnetic field.

• A disorder of sheep caused by worms in the liver.

• A cylindrical sample of rock or other materials obtained by core drilling.

• A tiny sample of organic material obtained by means of a fine-needle biopsy.

• The central part of a protein structure consisting in mostly hydrophobic aminoacids.

• The set of feasible allocations that cannot be improved upon by a subset (a coalition) of the economy's agents.

• A hollow cylindrical piece of cardboard around which a web of paper or plastic is winded.

• An atomic nucleus plus inner electrons (i.e. except valence electrons).

Meaning

• To remove the core of an apple or other fruit.

• To extract a sample with a drill.