from CC Search 

keyword =business meeting

I am often asked to recommend a website to go to for Copyright free images. The Electronic Library at Cardiff Met offers many links to image databases  that we recommend, some (marked with a black or a green copyright symbol)  like Bridgeman Education and Visual Arts Data Service offer copyright free images for educational use.

 I can also recommend a single page to which you can navigate on the internet which will allow you to search a whole selection of different image databases …not just images of art and design… made available under a  Creative Commons licence.

Creative Common licences all offer, as minimum, permission to copy so long as the image is marked clearly with details of who first created it (attribution). To learn more about Creative Commons licences (which are voluntarily  applied by creators to their works and can apply to text, images , music and all copyrighted materials) you should go here.
To search for all those Creative Commons licensed images  go here. Enter a keyword and select a source to search from the range offered ( various interesting websites ) results will bring back Creative Commons licenced images, moving images and sound.