Used to introduce a new topic; incidentally, by the way.

Incidental; unplanned.

(Australia, UK, New Zealand) A length of sawn wood of cross section 4 inches by 2 inches, most often employed as structural framing lumber / timber.

in pairs, especially one of each sex

(idiomatic, usually with a negative) By a wide margin; indicates a very big difference or disparity.

(usually used attributively) A simple drawing exercise, intended especially for children, consisting of a line drawing that divides the artwork into distinct spaces, the intended color of each indicated by a number and referenced from a key.

alternative form of color by number / (rare) plural of color by number

(literally) Beside or alongside one another; close to one another and abreast. / (figuratively) In peace. / (figuratively) With a common purpose.

(slang, vulgar) To have complete control over someone, especially of a woman abusing a man's infatuation with her.

Heaven; the hereafter. Usually preceded with "the sweet."