(n): a basic or essential attribute shared by all members of a class
(n): the spatial property of being crowded together
(n): the property possessed by an array of things that have space between them
(n): strengthening the concentration (as of a solute in a mixture) by removing diluting material
(n): the act of increasing the strength of something
(n): increase in density
(n): a change resulting in an increase
(n): complete attention; intense mental effort
(n): the faculty or power of mental concentration
(n): bringing together military forces
(n): the social act of assembling
(n): great and constant diligence and attention
(n): persevering determination to perform a task
