chance-n; 5 Senses

Sense Number 1: an opportunity

Commentary: CHANCE[+state][+situation][+opportunity]
NOTE: implies a situation where one can achieve a goal
NOTE: does not imply the situation arose randomly, different from Sense 2

Examples:
They never gave him a chance to explain what happened.
This turn of events presents a chance for peace negotiations to go forward.
She had many chances to apologize but never did.
This program aims to give poor children a fair chance of getting an education.

Mappings:
WordNet 3.0 Sense Numbers: 1

Sense Number 2: events without apparent cause, random occurrence, luck

Commentary: CHANCE[+event][+random][+apparently]
NOTE: emphasis is on a specific event which has no apparent cause
NOTE: does not imply an undesirable outcome, different from Sense 3

Examples:
By chance I found Jane's watch under the car seat.
The staff left nothing to chance when preparing the president's trip abroad.
Black jack is supposed to be a game of chance.

Mappings:
WordNet 3.0 Sense Numbers: 2

Sense Number 3: risk, potential bad outcome

Commentary: CHANCE[+state][+potential][-desirable]
NOTE: entails a notion of likelihood, but the focus is on the avoidance of a negative outcome
NOTE: a restricted, negative usage of Sense 4, emphasizing avoidance, not the abstract measurement of probability.

Examples:
John is taking too many chances on the stock market with his portfolio.
This is a chance we'll have to take. (implies we'd prefer -not- to take it)
They fenced their yard to avoid the chance of having the children run into the street.

Mappings:

Sense Number 4: a measure of the likelihood or probability of an event

Commentary: CHANCE[+quantity][+measure][+likelihood]
NOTE: emphasis is on the amount of likelihood of some situation, not the situation itself.

Examples:
Is there any chance of him taking that job in London?
What are the chances of rolling ten sixes in a row?
Our team doesn't stand a chance to win the championship. (the odds are against us)
Fat chance! (slang meaning almost no likelihood)
There's a slim chance it will rain tonight.
Chances are they are sitting on a beach somewhere with a cold drink in hand.

Mappings:
WordNet 3.0 Sense Numbers: 4, 5

Sense Number 5: none of the above

Commentary: Automatically generated NOTA sense (bbn)

Examples:

Mappings: