to express, to say in words, to put into words

to show, to make apparent / to express, to put into words / to signify, to represent, to symbolize, to stand for

two-dimensional array

the second dimension / (by extension, Internet slang) the 2D (i.e. anime, manga, video games, etc.) world; the fictional world

one-dimensional array, vector

subject (at school); course / dividing into several categories; individual items

two, 2 / second

put in order, arrange, lay out

arrangement, alignment, placement / (mathematics, programming) array, table / (genetics) sequence (of DNA)

a student (usually of a university, sometimes of a high school)