a word in english or german - that includ the letters P L U S in a row
 - but has nothing to do with the typlical meaning of plus (for
example in german: plustern, english: surplus)

Hello Mhollwich,

Here's an english word containing the letters P L U S in a row (which
is not containing the typical meaning of "plus"):

- plush

Dictionary.com defines plush as:
http://www.dictionary.com/search?q=plush&r=2
"A fabric of silk, rayon, cotton, or other material, having a thick
deep pile."

Hope this helps!

This is a list of english words with PLUS in them - 

nonplus overplus peplus pepluses plus pluses plush 
plusher plushes plushest plushier plushily plushly plushy 
plussage plusses surplus

> grep 'plus' /usr/share/dict/words
aplustre
Melanoplus
nonplus
nonplusation
nonplushed
overplus
peplus
periplus
plus
plush
plushed
plushette
plushily
plushiness
plushlike
plushy
plusquamperfect
plussage
superplus
surplus
surplusage
---- nearly all of which do not have anything to do with the
traditional meaning of "plus"

Additional words

elevenplus 
pluses 
plush 
plusher 
plushest 
Aplustre 
Nonplus 
Nonplused 
Nonplusing 
Nonplussed 
Nonplussing 
Overplus 
Peplus 
superplusage 
periplus 
Melanoplus 
Yellowplush 
aiolopeplus 
amplus 
triplus

For what it's worth, the "plus" in "surplus" does have something to do
with the traditional meaning of "plus." Both words come from the same
root; etymologically speaking, "surplus" means "super plus."

Etymologies of the two words:
http://www.bartleby.com/61/77/S0917700.html
http://www.bartleby.com/61/50/P0385000.html

The Moby lexicon project, providing the most complete word lists in
several languages, is now available in the public domain.  You can
access the word lists from
http://www.dcs.shef.ac.uk/research/ilash/Moby/

(found by doing Google search on 'public domain word list')