Longman DOCE: 4. [uncountable] a way of printing a document in which the long sides are horizontal and the short sides are vertical ⇨ portrait OALD: 3. [U] (technical) the way of printing a document in which the top of the page is one of the longer sides: —picture at printout —compare portrait 很奇怪美国的词典没有给出这个释义,包括 AHD 和 Webster's unabridged