a recording of a light field done photographically

A hologram is a recording of a light field done photographically.

a three-dimensional image made with the aid of a laser

As stated, a hologram is a three-dimensional image made with the aid of a laser.

a structure which diffracts the light on an image

A hologram is actually a structure which diffracts the light on an image. '

a projection of an image

As a hologram is simply a projection of an image, an image has easily been applied to a variety of industries since an image's invention in the late 1940s.

a three-dimensional image confined in two dimensions

A hologram is a three-dimensional image confined in two dimensions.

a “real-world recording of an interference pattern which uses diffraction to reproduce a 3D light field

A hologram is a “real-world recording of an interference pattern which uses diffraction to reproduce a 3D light field, resulting in an image which still has the depth, parallax, and other properties of the original scene”.

a recording of an interference pattern between two beams of light

A hologram is a recording of an interference pattern between two beams of light, so that illumination with one beam automatically reconstructs the other, creating a 'three-dimensional' image.

a photographic recording of a three-dimensional image

A hologram is, in short, a photographic recording of a three-dimensional image.

an image that may look like a 3-D photograph

A hologram is an image that may look like a 3-D photograph, but a 3-D photographis conceptually very different.

a three-dimensional image of an object, which is produced by recording on photographic film the interference patterns formed by a split laser beam

As you know, a hologram is a three-dimensional image of an object, which is produced by recording on photographic film the interference patterns formed by a split laser beam.

a permanent record of the light reflected off an object

Like a photograph, a hologram is a permanent record of the light reflected off an object.