coherent

Something coherent is logical and clear. "I told you if you didn't do your homework you couldn't watch TV. You didn't do your homework so you can't watch TV." This is a coherent argument (and annoying as well).

The thing about such coherent arguments, as your Mom well knows, is that they are also easily and clearly understood. If someone speaks coherently, they are speaking clearly and lucidly. A slight variation on the meaning comes in the sense of something that is united clearly as a whole and a recognizable entity. You might say, for example, that New York City is a "culturally coherent region" within the United States.

Primary Meanings of coherent

1.
adj
marked by an orderly, logical, and aesthetically consistent relation of parts
2.
adj
sticking together
Full Definitions of coherent
1

adj marked by an orderly, logical, and aesthetically consistent relation of parts

“a coherent argument”
Synonyms:
consistent, logical, ordered
seamless
perfectly consistent and coherent
logical
capable of or reflecting the capability for correct and valid reasoning
rational
consistent with or based on or using reason
Antonyms:
incoherent
without logical or meaningful connection
confused, disconnected, disjointed, disordered, garbled, illogical, scattered, unconnected
lacking orderly continuity
fuzzy
confused and not coherent; not clearly thought out
illogical, unlogical
lacking in correct logical relation
irrational
not consistent with or using reason
show more antonyms...

adj (physics) of waves having a constant phase relation

Antonyms:
incoherent
(physics) of waves having no stable definite or stable phase relation

adj capable of thinking and expressing yourself in a clear and consistent manner

“she was more coherent than she had been just after the accident”
Synonyms:
logical, lucid
rational
consistent with or based on or using reason
2

adj sticking together

“two coherent sheets”
Synonyms:
tenacious
adhesive
tending to adhere

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