To make a declaration, or give evidence, under oath. / To make a statement based on personal knowledge or faith.

A perennial grass, of the genus Cynosurus, that is grown for fodder

(golf) The land where one plays golf, with tees, fairways, greens and flags in holes.

(rhetorical question, somewhat hostile) Expresses discomfort because the interlocutor is looking at something; usually, this is said when the interlocutor has been staring at the speaker.