(now historical or astrology) Each of the seven major bodies which move relative to the fixed stars in the night sky—the Moon, Mercury, Venus, the Sun, Mars, Jupiter and Saturn.

(uncountable) Organisms, especially small and microscopic ones, that drift in water. / (uncountable) A plankter, any single organism that drifts in water.

(botany) An organism that is not an animal, especially an organism capable of photosynthesis. Typically a small or herbaceous organism of this kind, rather than a tree.

(transitive, intransitive) To place (a seed or plant) in soil or other substrate in order that it may live and grow.

A long, broad and thick piece of timber, as opposed to a board which is less thick.

(transitive) To cover something with planking. / (transitive) To bake (fish, etc.) on a piece of cedar lumber. / (transitive, colloquial) To lay down, as on a plank or table; to stake or pay cash.

clipping of paper airplane. / clipping of paper aeroplane.

Of a surface: flat or level.

A level or flat surface. / (geometry) A flat surface extending infinitely in all directions (e.g. horizontal or vertical plane). / (anatomy) An imaginary plane which divides the body into two portions.

(countable, carpentry) A tool for smoothing wood by removing thin layers from the surface.