(geometry) Any of a certain family of graphs related to Keller's conjecture, such that the vertices of the Keller graph of dimension n are the 4ⁿ elements (m₁,...,mₙ) where each m is 0, 1, 2, or 3,...

A lullaby.

A season ticket. / (video games) A digital season ticket that grants a user the access to all current and future DLC for a video game.

That winds upwards.