leaf

noun

1. (countable, uncountable)The usually green and flat organ that represents the most prominent feature of most vegetative plants.

   “Earless ghost swift moths become “invisible” to echolocating bats by forming mating clusters close (less than half a meter) above vegetation and effectively blending into the clutter of echoes that the bat receives from the leaves and stems around them.”

2. (countable, uncountable)A foliage leaf or any of the many and often considerably different structures it can specialise into.
3. (countable, uncountable)Anything resembling the leaf of a plant.
4. (countable, uncountable)A sheet of a book, magazine, etc. (consisting of two pages, one on each face of the leaf).

   “Heretofore advertisers have had to buy and pay for a leaf — two pages.”

5. (countable, uncountable)A sheet of any substance beaten or rolled until very thin.

   “gold leaf”

6. (countable, uncountable)One of the individual flat or curved strips of metal, typically made of spring steel, that make up a leaf spring.

   “Lumbering down a precipitous "slideway," the Thornycroft broke two main leaves in the back spring[.]”

7. (countable, in-plural, uncountable)Tea leaves.
8. (countable, uncountable)A flat section used to extend the size of a table.
9. (countable, uncountable)A moveable panel, e.g. of a bridge or door, originally one that hinged but now also applied to other forms of movement.

   “The train car has one single-leaf and two double-leaf doors per side.”

   “The bridge shear locks were repaired and the long ends of the shear locks shortened about two inches to eliminate butting of the bridge leafs against each other.”

   “The four separate segments of the movable bridge span, known as bridge leafs, were alternately rehabilitated while maintaining upper-level roadway and pedestrian traffic on one-half of the bridge and waterway traffic on one-half of the river channel.”

10. (countable, uncountable)In a tree, a node that has no descendants.

    “The algorithm pops the stack to obtain a new current node when there are no more children (when it reaches a leaf).”

11. (countable, uncountable)The layer of fat supporting the kidneys of a pig, leaf fat.
12. (countable, uncountable)One of the teeth of a pinion, especially when small.
13. (slang, uncountable)Cannabis.
14. (Internet, countable, humorous, pejorative, sometimes, uncountable)A Canadian person.
15. (countable, uncountable)A particular value of the EAX register when a program runs the CPUID instruction; each leaf represents a different category of information returned about the processor.

    “X86_FEATURE_HETERO_CORE_TOPOLOGY is used to identify whether the processor support heterogeneous core type by reading CPUID leaf Fn_0x80000026_EAX and bit 30. if the bit is set as one, then amd_pstate driver will check EBX 30:28 bits to get the core type.”

16. (Internet, humorous, pejorative, sometimes)A Canadian person.
17. (Canada, slang)A member of the Toronto Maple Leafs hockey team, its organization, or its supporters.
18. A model of car built by Nissan, with a name chosen for its green connotations.

verb

1. (intransitive)To produce leaves; put forth foliage.

   “Then flowered the mead, then leafed all 'Twas caused by the runic lay.”

2. (transitive)To divide (a vegetable) into separate leaves.

   “The lettuce in our burgers is 100% hand-leafed.”

3. (informal, transitive, uncommon)To play a prank on someone by throwing a large clump or collection of leaves at them.

name

1. A surname from Old English.