The phrase "big signings" refers to important or significant agreements made to hire or add someone important to a particular organization, usually in the context of sports teams or businesses. Full definition
The first big sign of pregnancy is obviously a missed period. (doctor-info.website)
We ended up doing a little weekend wandering and came across a farm with big signs for corn, tomatoes, and watermelon. (azgrabaplate.com)
I outlined my belief about the club's current transfer strategy, which is gradually strengthening the squad through one big signing in a window. (justarsenal.com)