fourth

1. fourth (adj) — sense 1

Definition: The ordinal form of the number four.

Example: The fourth model is called the enlightment model: Actors are seen to be responsible for problems but unable or unwilling to provide solutions. They are believed to need discipline provided by authoritative guidance. The Alcoholic Anonymous^([sic]) groups are considered prototypical for this model.

2. fourth (noun) — sense 2

Definition: The person or thing in the fourth position.

Example: We are one F and two M's seeking the company of a fourth (M or F) for our spacious and friendly Somerville apt.

3. fourth (noun) — sense 3

Definition: A quarter, one of four equal parts of a whole.

4. fourth (noun) — sense 4

Definition: The fourth gear of an engine.

5. fourth (verb) — sense 5

Definition: To agree with a proposition or statement after it has already been thirded.

Example: If he remembered rightly what took place in the House on the first night of the session, the Attorney General would have to file an information, not only against the noble Lord who proposed the address, and the hon. Member for London who seconded it, but also against the hon. Member who thirded, and the noble Lord who fourthed it, and indeed against every Member in the House.