Englishfor English speakers
a posteriori mean
a
Determinative
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A is used when the following word could be any of a certain type.
Compare "A book I saw on the shelf" and "The book I gave you yesterday".
a
Noun
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A is the first letter of the alphabet.
The letter "a" comes before "b".
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In some schools, an A is a very high grade.
Ron got an A on his earth science test.
mean
Verb
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A word means something when the word expresses the same idea as the other something.
Slay means kill. Both of them mean to make dead.
mean
Adjective
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When you are a mean person, you are not nice.
The boys who hit you were very mean.
mean
Noun
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The mean is a measure of the average of a list of numbers. The sum total of the numbers divided by how many numbers in the list.
The mean of the numbers 2,3,4 is 3. (2+3+4)/3 = 9/3 = 3.