What is the definition of "Umbreon" in Bulbapedia?

According to Bulbapedia, Umbreon is a dark-type Pokémon and is one of Eevee's final evolved forms. Umbreon evolves from Eevee when around a Moon Shard or when leveled up at night with high friendship.

Umbreon is a Pokémon with a black body, four legs, crimson eyes, pointed ears and two pairs of pointed teeth. Nintendo states that it has yellow markings that glow at night and cause fear in those around it. Umbreon is rare in the wild and is usually found in urban areas. Eevee evolves into Umbreon as an alternative to Vaporeon, Jolteon, Flareon, Espeon, Leafeon, Glaceon and Sylveon. Its most significant appearance in the Pokémon anime episodes was as an evolution of Gary's Eevee.