How to add a point inside newtheorem (definition)?

Good day, please give me the idea to add the point right after number of the definition?

My MWE is:

documentclass{article}
usepackage[utf8]{inputenc}
usepackage[english]{babel}
usepackage{amssymb}
usepackage{amsthm}

theoremstyle{definition}
newtheorem{definition}{Definition}[section]

begin{document}

section{Introduction}

theoremstyle{definition}
begin{definition}[something]
A fibration is a mapping between two topological spaces that has the homotopy lifting property for every space $X$.
end{definition}
end{document}