English to English adjective
1 
Of the nature of a cipher; of no weight or influence.  source: webster1913 noun
2 
a message written in a secret code  source: wordnet30
3 
a mathematical element that when added to another number yields the same number  source: wordnet30
4 
a quantity of no importance  Example:
• it looked like nothing I had ever seen before • reduced to nil all the work we had done • we racked up a pathetic goose egg • it was all for naught • I didn't hear zilch about it
source: wordnet30
5 
a person of no influence  source: wordnet30
6 
a secret method of writing  source: wordnet30
7 
A character [0] which, standing by itself, expresses nothing, but when placed at the right hand of a whole number, increases its value tenfold.  source: webster1913 verb
8 
convert ordinary language into code  Example:
• We should encode the message for security reasons
source: wordnet30
9 
make a mathematical calculation or computation  source: wordnet30
10 
To use figures in a mathematical process; to do sums in arithmetic.  source: webster1913
11 
To write in occult characters.  source: webster1913
