dead center

: deprived of life : no longer alive

: having the appearance of death : deathly

: lacking power to move, feel, or respond : numb

: someone who is no longer alive : one that is dead (see ¹dead 1)

: the state of being dead

: the time of greatest quiet

: absolutely, utterly

: suddenly and completely

: directly

: the point around which a circle or sphere is described

: the center of the circle inscribed in a regular (see ¹regular 2b) polygon

: a point, area, person, or thing that is most important or pivotal in relation to an indicated activity, interest, or condition

: to place or fix at or around a center or central area

: to give a central focus or basis

: to adjust (things, such as lenses) so that the axes coincide