Hypernyms (medication is a kind of...): drug (a substance that is used as a medicine or narcotic). Meronyms (substance of medication): physostigmine (used in treatment of Alzheimer's disease and glaucoma).
Definition of weather for English Language Learners. : the state of the air and atmosphere at a particular time and place : the temperature and other outside conditions (such as rain, cloudiness, etc.) at a particular time and place.
The difference between weather and climate is a measure of time. Weather is what conditions of the atmosphere are over a short period of time, and climate is how the atmosphere behaves over relatively long periods of time. When we talk about climate change, we talk about changes in long-term averages of daily weather.