Main entry: ordered, logical, consistent, coherent
Definition: marked by an orderly, logical, and aesthetically consistent relation of parts
Usage: a coherent argument
Antonyms: incoherent
Definition: without logical or meaningful connection
Antonyms: seamed
Definition: having or joined by a seam or seams
Main entry: logical
Definition: capable of or reflecting the capability for correct and valid reasoning
Usage: a logical mind
Antonyms: unlogical, illogical
Definition: lacking in correct logical relation
Antonyms: informal
Definition: not formal
Antonyms: informal
Definition: used of spoken and written language
Main entry: coherent, logical, lucid
Definition: capable of thinking and expressing yourself in a clear and consistent manner
Usage: a lucid thinker; she was more coherent than she had been just after the accident
Antonyms: irrational
Definition: not consistent with or using reason
Antonyms: irrational
Definition: real but not expressible as the quotient of two integers
Main entry: legitimate, logical
Definition: based on known statements or events or conditions
Usage: rain was a logical expectation, given the time of year
Antonyms: invalid
Definition: having no cogency or legal force