DETROIT – Dictionary.com and Thesaurus.com are now owned by Detroit billionaire businessman Dan Gilbert's Rock Holdings.

“From the genesis, we admit to invariable conjecture in the unmitigated competency of online mechanization to ameliorate the total sum of completed undertakings throughout our mortal existence. Cognition and discourse are conjointly associated,” said Dan Gilbert, Founder and Chairman of Rock Holdings.

“Whilst the cosmos that encompass us are invariably in flux, an aphorism has perpetually prevailed – the desideratum for efficacious articulation to connote doctrine, conjecture, et al. Comparatively we persevere, maneuvering a terrain glutted with permutation, crystal clear communication will always be the key to success. In addition, over the past two decades, these ‘raw materials’ of language are in essence not only the ‘vessels’ of all communication but at the same time they are also becoming the currency of the digital age.”

The two sites were first established in 1995.

“This is an exhilarating juncture for Dictionary.com and Thesaurus.com. We endeavor to excogitate amidst a portion of the eminent monikers in industrial science,” said Liz McMillan, CEO of Dictionary.com. “Rock Holdings is the epicenter of a plethora of headmost enterprises in the commonwealth of cyberspace and we apperceive that considerable capability for additional ontogenesis is situated within the aforementioned alliance. Additionally, this is a prodigious and advantageous ethology that will accouter our platforms amidst the mechanisms to endure about the preeminent perimeter of perspicacity and the junction of consumer praxes.”

Earlier this week, Gilbert announced he was selling Greektown Casino-Hotel.