conditional

American  

[kuhn-dish-uh-nl] / kənˈdɪʃ ə nl /

adjective

1. imposing, containing, subject to, or depending on a condition or conditions; not absolute; made or allowed on certain terms.

   conditional acceptance.

   Synonyms:

   relative, contingent, dependent

2. Grammar. (of a sentence, clause, mood, or word) involving or expressing a condition, as the first clause in the sentence If it rains, he won't go.

3. Logic.

   1. (of a proposition) asserting that the existence or occurrence of one thing or event depends on the existence or occurrence of another thing or event; hypothetical.

   2. (of a syllogism) containing at least one conditional proposition as a premise.

4. Mathematics. (of an inequality) true for only certain values of the variable, as x + 3 > 0 is only true for real numbers greater than −3.

---

noun

1. Grammar.

   1. (in some languages) a mood, tense, or other category used in expressing conditions, often corresponding to an English verb phrase beginning with would, as Spanish comería “he would eat.”

   2. a sentence, clause, or word expressing a condition.

conditional British  

/ kənˈdɪʃənəl /

adjective

1. depending on other factors; not certain

2. grammar (of a clause, conjunction, form of a verb, or whole sentence) expressing a condition on which something else is contingent: " If he comes " is a conditional clause in the sentence " If he comes I shall go "

3. 1. (of an equation or inequality) true for only certain values of the variable: x ² –1 = x + 1 is a conditional equation, only true for x = 2 or –1

   2. (of an infinite series) divergent when the absolute values of the terms are considered

4. Also: hypothetical.  logic (of a proposition) consisting of two component propositions associated by the words if…then so that the proposition is false only when the antecedent is true and the consequent false. Usually written: p → q or p ⊃ q, where p is the antecedent, q the consequent, and → or ⊃ symbolizes implies

---

noun

1. grammar

   1. a conditional form of a verb

   2. a conditional clause or sentence

2. logic a conditional proposition

Other Word Forms

• conditionality noun
• conditionally adverb
• nonconditional adjective

Etymology

Origin of conditional

1350–1400; Middle English condicionel < Anglo-French, Middle French < Late Latin condiciōnālis, equivalent to condiciōn- (stem of condiciō ) condition + -ālis -al ¹

Explanation

Something conditional is dependent on other factors. You might receive a conditional offer of acceptance from a college, depending on your high school graduation and your maintaining passing grades. For a clue to the meaning of conditional, look at an opposing term: unconditional surrender, which means someone surrenders and doesn't ask for anything in return. In a conditional surrender, someone will give up only if certain things happen. A conditional agreement is dependent on other factors: a company could make a conditional hire, meaning they'll hire you only if you finish your degree and take a blood test. When you see the word conditional, think "It depends."

Example Sentences

Hours after Trump made the threat, on Tuesday, 7 April, the US and Iran agreed to a conditional two-week ceasefire.

From BBC • Apr. 13, 2026

Iran and the US agreed to the conditional ceasefire on Tuesday, just over an hour before the expiry of the deadline Trump had set for Iran to make a deal.

From BBC • Apr. 8, 2026

Chip stocks across Asia rose sharply as the conditional cease-fire buoyed investor sentiment about lower chip-making costs and a continued AI investment boom.

From The Wall Street Journal • Apr. 8, 2026

With copper’s long-term uptrend intact and sentiment turning up from extreme pessimism, copper becomes a conditional confirmation test for the reopening theme.

From Barron's • Apr. 3, 2026

An interesting elaboration on the concept of conditional probability is known as Bayes’ theorem, first proved by Thomas Bayes in the eighteenth century.

From "Innumeracy: Mathematical Illiteracy and Its Consequences" by John Allen Paulos

Related Words

• limited
• provisional
• restrictive
• tentative