0 something that is mysterious and seems impossible to understand completely:
She is something of an enigma.
The newspapers were full of stories about the enigma of the plane's disappearance.
1 someone or something that is mysterious and impossible to understand:
He is an enigma to most people.
Adding to "the enigma of soil animal diversity": fungal feeders and saprophagous soil invertebrates prefer similar food substrates.
The other possibilities should also be borne in mind when investigating tick toxicoses as the enigma of toxin origins for most tick toxins still exists.
While questions remain concerning the dynamics of turbulent decay downstream from a grid, in comparison the dynamics of turbulent flames are a complete enigma.
This enigma would be solved if one considers dourine as the chronic form of both diseases.
Yet why bother to craft such an elaborate enigma for the title page?
The basic enigma of music remains how its temporality may lead to an experiential likeliness of that which is beyond time.
This indifference, however, is an enigma for thought.
For those who do not subscribe to the natural law theory, the enigma is indecipherable.