The ornamental design for a ceilingfan, as shown and described.
FIG. 1 is a perspective view of a ceiling fan in accordance with my design;
FIG. 2 is a top plan view of the ceiling fan in accordance with my design;
FIG. 3 is a bottom plan view of the ceiling fan in accordance with my design;
FIG. 4 is a side elevation view of the ceiling fan in accordance with my design, the opposite side being identical thereto; and,
FIG. 5 is a front elevation view of the ceiling fan in accordance with my design, the rear view being identical thereto.
The broken-line disclosure of elements is understood to represent portions of the article in which the design is embodied, but which form no part of the claimed design.