Abstract
The aim of the present paper is to list the usual and some possible meanings--or at least those the writer found the most interesting--of the word 'level,' to specify them briefly, to illustrate them, and to propose some problems in which those concepts are involved. Should this semantical clarification prove useful in clearing the ground for ontological speculation, the thesis would be confirmed that there is no conflict between semantics and ontology as long as the former does not deny the legitimacy of inquiries into the denotata of certain universal words, and as long as metaphysics is not reluctant to linguistic hygiene.