knock-n; 6 Senses

Sense Number 1: the noise of something rapping against a surface

Commentary: KNOCK[+event][+noise][+rap][+against_surface]

Examples:
Mary heard a knock at her bedroom window.
The knock at the door grew louder.
It was another sign that the knock of hard times was at their door. (metaphoric extension)
John recognized the offer as the knock of opportunity. (metaphoric extension)

Mappings:
PropBank: knock.01
WordNet 3.0 Sense Numbers: 1, 5

Sense Number 2: negative criticism

Commentary: KNOCK[+event][+speech_act][+criticism][+negative]

Examples:
Sally ignored the snide knocks of her classmates.
Bob made an unkind knock about John's presentation.

Mappings:
PropBank: NM
WordNet 3.0 Sense Numbers: 2

Sense Number 3: a forceful physical punch or blow

Commentary: KNOCK[+event][+punch][+forceful]

Examples:
The boxer delivered a knock to his opponent's right temple.
The casing is tough enough to withstand serious knocks.
With the bases loaded, a knock out of the park would score four runs.

Mappings:
PropBank: knock.01
WordNet 3.0 Sense Numbers: 3

Sense Number 4: an unfortunate personal experience

Commentary: KNOCK[+event][+experience][+personal][+unfortunate]

Examples:
Those orphans have had some tough knocks early in life.
John said he graduated from the school of hard knocks.
It was a hard knock for Mary when someone filed the patent before she did.

Mappings:
PropBank: NM
WordNet 3.0 Sense Numbers: 4

Sense Number 5: faulty ignition in an engine

Commentary: KNOCK[+event][+noise][+ignition][+faulty][+of_engine]

Examples:
Cheap quality gasoline may cause a knock in your engine.
Improper ignition causes such knocks in an engine.

Mappings:
PropBank: NM
WordNet 0.0 Sense Numbers: 1a

Sense Number 6: an injury caused by a blow

Commentary: KNOCK[+entity][+human][+body_part][+injured][+by_blow]

Examples:
The sports doctor treated the team members for their knocks and bruises.
The doctor examined the nasty knock on Pete's head.

Mappings:
PropBank: NM
WordNet 0.0 Sense Numbers: 2a