What is the meaning of ō?

A common convention for a long vowel o

A dictionary transcription for the GOAT vowel

cloud

Rōmaji transcription of おう

Rōmaji transcription of おお

Rōmaji transcription of オー

The twenty-fifth letter of the Latgalian alphabet, written in the Latin script.

The twenty-third letter of the Livonian alphabet, written in the Latin script.

Hanyu Pinyin reading of

Hanyu Pinyin reading of

Hanyu Pinyin reading of

thy, your

rabbitfish

The twelfth letter of the Maori alphabet, written in the Latin script.

food, provisions

The twenty-first letter of the Samogitian alphabet, called ėlguojė ō and written in the Latin script.

The name of the Latin-script letter O/o.

The twenty-first letter of the Silesian alphabet, written in the Latin script.

Alternative form of ö

Source: wiktionary.org