Definition
Definition is a UK-based B2B marketing agency that specializes in integrated digital PR, SEO, content strategies, and leadership branding. The agency primarily serves technical sectors such as science, engineering, technology, professional services, and social impact. Definition focuses on building long-term brand authority and visibility for its clients by combining PR and SEO with data-driven insights and multimodal content, including articles, videos, and podcasts. The agency offers a range of services, including AI SEO, digital PR, and tailored support for technology and science PR. They
Investing activity
Definition appears in 2 AI deals tracked by the AI Lounge deals desk, rounds totalling $12M. The rounds are mostly Seed, with a median round size of $12M. The most recent are Primero AI (Seed, $12M, Aug 2026) and Decagon (Tender offer, Mar 2026).
Definition most often invests alongside General Catalyst, Kaszek Ventures, Conviction and 8VC, and the companies it backs on AI Lounge are mostly in AI and AI customer support agents.
Deals
Frequently asked questions about Definition
What AI companies has Definition invested in?
Definition's AI investments include Primero AI. The 2 rounds on AI Lounge are listed on this page with amounts, dates and co-investors.
Where is Definition based?
Definition is based in Bressingham, England, United Kingdom.
What stage does Definition invest at?
In the rounds tracked on AI Lounge, Definition has invested at Seed, with a median round of $12M.
Who does Definition co-invest with?
Definition's most frequent co-investors on AI Lounge are General Catalyst (1 deal), Kaszek Ventures (1 deal), Conviction (1 deal), 8VC (1 deal) and Coatue (1 deal).
How can founders reach Definition?
Founders on AI Lounge can see Definition's contact details in AI Investor Contacts (paid plans), check for a warm introduction through members who worked with the firm under Warm Paths, and add Definition to their Investor Pipeline to track the conversation.