adverb
in a line; in a row
Describes multiple things or people lined up in a row, often with a sense of length or extent. Similar to ずらり but with a slightly more emphatic or colloquial feel.
See also: ずらり
店の前に人がずらっと並んでいる。
People are lined up in a row in front of the store.
本棚に同じシリーズ
Books from the same series are lined up in a row on the bookshelf.