(UK, idiomatic) Irrelevantly, off-topic.

A secondary product; something made incidentally during the production of something else. / A side effect.

(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).

in pairs, especially one of each sex

(UK) A paved area at the side of a highway designated for drivers to stop in, for emergency parking, or where vehicles can wait, with larger lay-bys possibly having facilities like food vendors or public telephones.

(intransitive, obsolete) to stand aside

Alternative spelling of Byzantine

(historical) A byzant (coin).

(idiomatic) To deal with a matter in a direct manner, especially to confront a difficulty rather than avoid it.

(idiomatic) Manually; without the use of automation or machines. / (of raising a child) Without suckling it.