Definitions
In a level direction from side to side.
Word origin
From horizontal + -ly.
Used in a sentence
“Japanese can be written horizontally as well as vertically.”
“an organism transmitted horizontally”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Side to side”12 letters
Not quite right?
"Search similar patterns."
H___________