An image that can be read as the same word in a different manner, or as different words, when looked at from a different perspective (orientation/direction)

When a word or term can be calligraphed in a manner where it can denote two different terms or words when rotated / the angle is changed, its an ambigram. Not possible with ordinary calligraphy, it needs an old world feel.

The earliest known non-natural ambigram dates to 1893 by artist Peter Newell. Although better known for his children's books and illustrations for Mark Twain and Lewis Carroll, he published two books of invertible illustrations, in which the picture turns into a different image entirely when turned upside down. The last page in his book, Topsys & Turvys contains the phrase THE END, which, when inverted, reads PUZZLE

An ambigram is a typographical design or artform that may be read as one or more words not only in its form as presented, but also from another viewpoint,

An ambigram is a typographical design or artform that may be read as one or more words not only in its form as presented, but also from another viewpoint, direction, or orientation. The words readable in the other viewpoint, direction or orientation may be the same or different from the original words. Douglas R. Hofstadter describes an ambigram as a "calligraphic design that manages to squeeze two different readings into the selfsame set of curves." Different ambigram artists (sometimes called ambigramists) may create completely different ambigrams from the same word or words, differing in both style and form.
Source wikipedia

Graphical design that can be read as one or more words :D