(Canada, slang) A case of twenty-four bottles or cans of beer.

(chiefly Canada, US) A length of sawn wood of cross section approximately 2 inches by 4 inches, most often employed as structural framing lumber (dimension or dimensional lumber).

(Cincinnati) A serving of Cincinnati chili with spaghetti.

(of a highway) Allowing traffic in two directions. / (of traffic, visibility) Moving or occurring in opposite directions.

Having two legs or feet. / (sports) Ambidextrous of the feet; having equal ability with either foot. / (soccer) Using both feet.

having exactly two arms

(Cockney rhyming slang) A state (of upset, worry).

(mathematics) A measure of length given by "the square root of the squares." Denoted by ||·||₂, the two-norm of a vector ⃑v= is ||⃑v||₂=√. The two norm of an m⨯m matrix A is defined by max _(⃑v≠⃑0)|/} where ⃑v is an m-dimensional vector that is not the zero vector.

(computing) The number obtained by complementing every bit of a given number and adding one. A number and its complement add to 2ⁿ, where n is the word size of the machine.

Existing in two dimensions. / Not creating the illusion of depth; lacking detail or believability.