A longitudinal study (or longitudinal survey, or panel study) is a research design that involves repeated observations of the same variables (e.g., people) over long periods of time (i.e., uses longitudinal data).

LONGITUDINAL definition: of or relating to longitude or length. See examples of longitudinal used in a sentence.

The meaning of LONGITUDINAL is placed or running lengthwise. How to use longitudinal in a sentence.

medical, social sciences Longitudinal research is done on people or groups over a long period of time: longitudinal analysis / studies (Definition of longitudinal from the Cambridge Advanced Learner's …

longitudinal, adj. & n. meanings, etymology, pronunciation and more in the Oxford English Dictionary

Definition of longitudinal adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Dec 30, 2025 · Adjective longitudinal (not comparable) Running across a set direction of an object.

Dec 13, 2023 · In longitudinal studies, researchers do not manipulate any variables or interfere with the environment. Instead, they simply conduct observations on the same group of subjects over a period …

A longitudinal line or structure goes from one end of an object to the other rather than across it from side to side. That stability lends itself to longitudinal analysis. Collins COBUILD Advanced Learner’s …

of or pertaining to longitude or length: longitudinal measurement. extending in the direction of the length of a thing; running lengthwise: a thin, longitudinal stripe. Zoology pertaining to or extending along the …