One who has been around for a long time or has a great deal of experience; a veteran.

The country of origin of an immigrant or of a person of immigrant descent.

(Australia, New Zealand) Britain, England, London, or Ireland; the Old Country. / (colloquial, UK, naval) Dartmouth Royal Navy College.

(informal, idiomatic) A style, way of thinking, or method for accomplishing a task that was employed in a former era, remembered either for its inferiority to the current method, or for its time-honored superiority over the new way.

(informal, idiomatic) Characteristic of a style, outlook, or method employed in a former era, remembered either as inferior to the current style, or alternately, remembered nostalgically as superior or preferable to the new style, the older denoting something that would be considered out of date or out of fashion to some, but as such, is considered by others as cool and hip.

Used other than figuratively or idiomatically: see old, sod (person). / (US, Ireland) The old country; one's place of origin.

(Britain, slang, law enforcement) A police officer / (British slang, frequently with the) The police force. / (British slang, dated) A soldier, especially one who resembles the cartoon character.

The language of Scandinavia until the 14th century, the common ancestor of modern Swedish, Danish, Norwegian, Faroese, and Icelandic.

Old Church Slavonic language / Proto-Slavic language / Old East Slavic language

(literally) An elderly woman. / (countable, informal, derogatory) A person (irrespective of age or sex) who is always complaining about his or her situation. / (countable, informal, slang) One's wife.