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 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 an enlarged front elevation view of the ceiling fan in accordance with my design;
FIG. 5 is an enlarged back elevation view of the ceiling fan in accordance with my design;
FIG. 6 is an enlarged side elevation view of the ceiling fan in accordance with my design; and,
FIG. 7 is an enlarged opposite side elevation view of the ceiling fan in accordance with my design.
The broken line showing of the canopy, support rod and top apertures is included for the purpose of illustrating environmental structure and forms no part of the claimed design.