The Webster's Dictionary defines assertiveness in a straight forward way. According to that source, it is disposed to or characterized by bold or confident statements and behavior.
The definition of Corinth according to Websters Dictionary is: A city of southern Greece in the northeast Peloponnesus on the Gulf of Corinth. It is near the site of the ancient city or Corinth.
Here is the link to Webster's Dictionary - if you use that, you can find any definition you want.
Yes, of course, as there is no such thing as a unique 'dictionary definition' for a word. What you'd be doing is picking one dictionary, whether it be the OED, or Websters, etc, and plagiarising the wording that they chose to use to define it.
It is not in the "Merrian Websters Intermediate Dictionary".
It is called a manse. See websters for the definition: http://www.merriam-webster.com/dictionary/manse
The definition for the word catechism can be found in a huge number and variety of different places. These places include Merriam Websters dictionary, both online and offline.
Zulu
Yes it is in the Merriam-Websters Dictionary
The British dictionary have British English and the Webster dictionary have American English
According to websters dictionary it is an adverb
Websters definition of Dufus can be found on their website but in essence they define Dufus as a stupid person, an incompetent person or a foolish person.
The word "outreach" was first included in the Webster's Dictionary in 1976.