a. ❶ (of a book) without a binding or cover(书)未经装订(缺少封面)的。 ❷ (of an unmarried man)not yet bound by the ties of marriage (未婚者)尚未受到婚姻关系约束的。 △Rom . 1 . 3 . 87: “This precious bookof love,this unbound lover,/ To beautify him,onlylacks a cover . ”这爱情的宝书,这无拘束的情人,要想加以美化,只差封面的装帧。