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

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).

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

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 …

1. of or pertaining to longitude or length: longitudinal measurement. 2. extending in the direction of the length of a thing; lengthwise. 3. of or extending along the long axis of the body, or the direction from …

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