and |and| conjunction • used to connect words of the same part of speech, clauses, or sentences that are to be taken jointly : bread and butter | red and black tiles | they can read and write | a hundred and fifty • used to connect two clauses when the second happens after the first : he turned around and walked out | she washed and dried her hair • used to connect two clauses, the second of which results from the first : do that once more, and I'll skin you alive • connecting two identical comparatives, to emphasize a progressive change : getting better and better | he felt more and more like an outsider • connecting two identical words, implying great duration or great extent : I cried and cried | it takes hours and hours • used to connect two identical words to indicate that things of the same name or class have different qualities : all human conduct is determined or caused—but there are causes and causes • used to connect two numbers to indicate that they are being added together : six and four make ten • archaic used to connect two numbers, implying succession : a line of men marching two and two.