As nouns the difference between zeta and meta

is that zeta is the name of the sixth letter of the modern Greek alphabet ({{term|Ζ|lang=el}}, {{term|ζ|lang=el}}) preceded by epsilon ({{term|Ε|lang=el}}, {{term|ε|lang=el}}) and followed by eta, ({{term|Η|lang=el}}, {{term|η|lang=el}}); or the seventh letter in the ancient Greek alphabet, in which it is preceded by digamma ({{term|Ϝ|lang=grc}}, {{term|ϝ|lang=grc}} while meta is boundary marker.

As a proper noun Zeta

is a medieval state roughly equivalent to modern Montenegro.

As an adjective meta is

self-referential; at a higher level.