The ornamental design for a ceilingfan, as shown and described.
FIG. 1 is a bottom perspective view of a ceiling fan showing an embodiment in accordance with my design;
FIG. 2 is an enlarged top plan view of the ceiling fan in accordance with my design;
FIG. 3 is an enlarged bottom plan view of the ceiling fan in accordance with my design;
FIG. 4 is an enlarged side elevation view of the ceiling fan in accordance with my design, the opposite side being a mirror image of that shown; and,
FIG. 5 is an enlarged front elevation view of the ceiling fan in accordance with my design, the opposite side being a mirror image of that shown.
FIGS. 4 and 5 are identical except for the positioning of the fan blades.
The broken line showing of the portions of a ceiling fan is included for the purpose of illustrating environmental structure and forms no part of the claimed design.