The ornamental design for a ceilingfan, as shown and described.
FIG. 1 is a top perspective view of a ceiling fan, showing my new design;
FIG. 2 is a bottom perspective view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a bottom view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a left side view thereof;
FIG. 7 is a rear view thereof; and,
FIG. 8 is a front view thereof.
Portions of the ceiling fan are shown in broken lines. Portions shown in broken lines form no part of the claimed design. Jagged break lines shown in broken lines represent broken away symbols and form no part of the claimed design. The appearance of any portion of the ceiling fan blades between jagged break lines forms no part of the claimed design.