DirectX 11 (or DX11) is a set of drivers distributed by Microsoft that offer improved visual and audio performance. Its main function, and the one for which it is best known, is allow you to run games with excellent state of the art graphics in video games.
A reprimand is a severe, formal or official reproof. Reprimanding takes in different forms in different legal systems. A reprimand may be a formal legal action issued by a government agency or professional governing board (e.g. medical board, bar council). It may also be an administrative warning issued by an employer or school.
If you're reprimanded, someone in authority speaks to you in an angry way because you've done something wrong. Or you might reprimand your dog if he steals your hot dog. The House of Representatives has a couple of ways to punish naughty members. One way is to reprimand them by voting to express disapproval. In 2009, Representative Joe Wilson was reprimanded after his outburst of You lie! during President Obama's speech.