sum Posted on October 21, 2025 by Hana Videen sum, adj: some, one of many, certain (as in ‘a certain book’). (sum / sʌm) Share this:Share Email a link to a friend (Opens in new window) Email Share on Facebook (Opens in new window) Facebook Share on X (Opens in new window) X Share on Tumblr (Opens in new window) Tumblr Like Loading... Related