proposition

Everyday

1. An idea, plan or offer that is suggested, especially in business: a business proposition. tree →
2. (maths, logic) A statement that is either true or false: «7 is odd» is a true proposition. tree →
3. A task or thing to deal with, described in a certain way: «That hill is a tough proposition». tree →
4. (verb, informal) To make an improper suggestion to someone (adult use). tree →

In the lessons

In maths and logic, propositions are statements you test: true or false; puzzles and proofs use them. In business and stories, characters make propositions: «I have a proposition for you». In everyday speech «a different proposition» means a different kind of challenge. Formal voice. Phrases: «a business proposition», «an attractive proposition», «a tough proposition», «a different proposition».

Examples

• «All squares have four sides» is a true proposition. tree →
• Is the proposition «10 is odd» true or false? tree →
• The pirate had a proposition for the sailors. tree →
• Climbing the mountain in winter is a tough proposition. tree →
• Selling lemonade was a good business proposition. tree →
• The idea of a free trip was an attractive proposition. tree →
• Prove the proposition step by step. tree →
• The proposition pleased the two others, and they set out on their way together. tree →

Note

Countable: propositions. Related: propose, proposal (a proposal is more common for plans). The verb use is adult and rare; children need the noun senses.