Meaning of the word longitudinal in English

What does longitudinal mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

longitudinal

US /ˌlɑːn.dʒəˈtuː.dɪ.nəl/
UK /ˌlɒŋ.ɡɪˈtʃuː.dɪ.nəl/
"longitudinal" picture

Adjective

1.

running lengthwise rather than crosswise

Example:
The bridge has strong longitudinal beams.
The fabric has a longitudinal stripe pattern.
2.

involving the study of a group of people or things over a long period of time

Example:
The researchers conducted a longitudinal study on child development.
This project requires a longitudinal analysis of data.