RhymeZone: marginal definitions

Definitions of marginal:

adjective: producing at a rate that barely covers production costs
Example: "Marginal industries"
adjective: of something or someone close to a lower limit or lower class
Example: "Marginal abilities"
adjective: of questionable or minimal quality
Example: "Marginal writing ability"
adjective: just barely adequate or within a lower limit
Example: "A marginal victory"
adjective: of a bare living gained by great labor
Example: "A marginal existence"
adjective: at or constituting a border or edge
Example: "The marginal strip of beach"