Science
The word "science" means the activity by which humanity, individually or in small or large groups, makes an organized attempt through the objective study of observable phenomena to discover and master causal chains; brings together resulting subsystems of knowledge in a coordinated form by systematically reflecting and explaining them using concepts, often expressed to a considerable extent by mathematical symbols; and thereby provides itself with the possibility of using understanding of processes and phenomena occurring in nature and society for its own benefit
Source: UNESCO RECOMMENDATION "ON THE STATUS OF SCIENTIFIC RESEARCH WORKERS"