to find out definitely; learn with certainty or assurance; determine

to ascertain the facts.

Archaic . to make certain, clear, or definitely known.

verb

catch on , check , check out * , check up on , confirm , determine , dig * , discover , divine , double-check , establish , eye * , eyeball , find out , fix , get down cold , get down pat , get hold of , get it down , get the hang of , identify , learn , learn the ropes * , look-see , make certain , make sure , peg * , pick up * , pick up on , read , see , settle , size , size up * , tell , verify , find , hear , doublecheck , unearth