| forward |
toward a place or time that is further on; ahead. [7 definitions] |
| fossil |
the remains or trace of a living animal or plant from a long time ago. Fossils are found embedded in earth or rock. |
| fossil fuel |
any carbon-containing fuel formed from the remains of prehistoric plants and animals. Coal, petroleum, and natural gas are examples of fossil fuels. |
| foster |
to aid and encourage the growth or development of. [2 definitions] |
| fought |
past tense and past participle of "fight." |
| foul |
very unpleasant to taste, smell, or look at. [11 definitions] |
| foul line |
either of the lines on a baseball field drawn from home plate through first and third bases to the outfield. Foul lines mark the area within which fair play takes place. [2 definitions] |
| foul up |
(informal) to make serious mistakes, or cause someone else to do so. |
| found1 |
past tense and past participle of "find." |
| found2 |
to set up or create; establish. |
| foundation |
the basis of something such as an action, substance, structure, or opinion. [4 definitions] |
| founder1 |
a person who establishes something new and important, such as an institution, religion, or nation. |
| foundry |
a place where metal is formed into different objects. |
| fountain |
a spray of water created by a machine, or the structure from which the water flows. [2 definitions] |
| fountain pen |
a pen that holds a small supply of ink, which is drawn to the pen's point. |
| four |
the word for the Arabic numeral 4 and the Roman numeral IV. [3 definitions] |
| Four-H club |
an organization in the U.S. that teaches young people about farming and how to take care of a home. Four-H clubs are so named because they are meant to improve the heads, hearts, hands, and health of their members. |
| foursquare |
having four equal sides that meet in four right angles; square. [4 definitions] |
| fourteen |
the word for the Arabic numeral 14 and for the Roman numeral XIV. [3 definitions] |
| fourteenth |
coming next after the thirteenth in a series. [3 definitions] |
| fourth |
coming next after the third in a series. [3 definitions] |