"Singular focus" means concentrating all of your attention, effort, and energy on one specific thing or goal, without getting distracted or deviating from it. Full definition
To get promoted in such an environment requires an almost singular focus on execution. (ct4biz.org)
By performing this experiment you can better determine which tasks might be fine done in parallel and which are completed more effectively given singular focus. (entrepreneur.com)
It has tried to act with a more singular focus, in a more unified way, and to bring other interest groups (military, religious, etc.) into the fold. (grist.org)