http://www.merriam-webster.com/dictionary/sustainable Merriam Webster dictionary sustainable http://www.merriam-webster.com/dictionary/sustainable Merriam-Webster Merriam-Webster definition Sustainability http://www.merriam-webster.com/dictionary/sustainable Merriam-Webster Merriam-Webster dictionary merriam-webster.com www.merriam-webster.com/dictionary/sustainable http://www.merriam-webster.com/dictionary/sustainable Merriam-Webster Merriam-Webster dictionary sustainability sustainable www.merriam-webster.com/dictionary/sustainable merriam-webster.com sustainability definition merriam-webster.com merriam-webster http://www.merriam-webster.com/dictionary/sustainable Merriam-Webster Merriam-Websters By definition