adj.
1.capable of or reflecting the capability for correct and valid reasoning
2.in accordance with reason or logic
3.marked by an orderly, logical, and aesthetically consistent relation of parts
4.based on known statements or events or conditions
5.capable of thinking and expressing yourself in a clear and consistent manner
Idiom of the Day
no end of/to (something)
seeming almost endless, very many or much of something
The man had no end of problems when he lived overseas for a year.