A male parent. The informal word is 'dad' or 'daddy'.

Countable noun. Plural: fathers. Informal equivalents: dad, daddy, pa. Common collocations: father figure, grandfather, father-in-law, fatherly. 'Father' is more formal than 'dad'.

Father's Day is celebrated in the UK and many English-speaking countries on the third Sunday of June. Fathers receive cards and gifts. The phrase 'like father, like son' means a son has the same qualities as his father. 'Father Christmas' is another name for Santa Claus in Britain.