An elderly man. / (slang) One's father. / (slang) A husband, or male significant other, irrespective of age. / (slang) One's male employer, irrespective of age.

(nonstandard) Alternative spelling of oldman

(Australia) (applied to plants and animals) Of exceptional size or age. / (Australia) (applied to weather) Of exceptional intensity.

A title given to the personification of a force of nature or abstract concept, such as Old Man Winter or Old Man River. / A creator god in some Native American mythologies.

(derogatory) An adult male, usually middle-aged or elderly, who acts in a lecherous or lewd manner.

bacterial pneumonia.

Achillea millefolium or common yarrow, a flowering plant native to temperate regions of the Northern Hemisphere.

(countable) Chionanthus virginicus, a tree. / Clematis aristata, an Australian climbing plant. / Clematis vitalba, a climbing plant. / (uncountable) Tillandsia usneoides, a bromeliad; Spanish moss.

A male leading light; a man who is the most senior exponent of a particular field.

Personification of the Mississippi River.