to shine with a softly tremulous or wavering light; to glimmer

to appear in a fluctuating wavy form

the shimmering heat from the pavement

to move with an unobtrusiveness suggestive of the play of light

Jeeves shimmered out and came back with a telegram — P G Wodehouse

a shimmering light

a wavering and distortion of the visual image of a far object usu resulting from heat-induced changes in atmospheric refraction