noun
plural -tions
[count] :something that is used or done to deal with and end a problem :something that solves a problem
[noncount] :the act of solving something
[count] a correct answer to a problem, puzzle, etc. - often + to
an explanation for something that is difficult to understand (such as a mystery) - often + to
a liquid in which something has been dissolved [count]
[noncount] :the act or process of dissolving a solid, liquid, or gas in a liquid