Bedeutung von “horizontal” — Learner’s Dictionary

horizontal

adjective us uk /ˌhɒrɪˈzɒntəl/

level and flat, or parallel to the ground or to the bottom of a page:

a horizontal line/stripe
horizontally adverb

The lines run horizontally across the page.

(Definition von “horizontal” aus dem Cambridge Learner's Dictionary © Cambridge University Press)