Tra từ declare - Từ điển Oxford Advanced Learner 8th

de·clare [declare declares declared declaring] BrE [dɪˈkleə(r)] NAmE [dɪˈkler] verb
1. transitive to say sth officially or publicly
•~ sth The government has declared a state of emergency.
• Germany declared war on France on 1 August 1914.
•The government has declared war on (= officially stated its intention to stop) illiteracy.
•~ that… The court declared that strike action was illegal.
•~ sth + noun The area has been declared a national park.
•~ sth to be sth The painting was declared to be a forgery.
•~ sth + adj. The contract was declared void.
•I declare this bridge open.
2. transitive to state sth firmly and clearly
•+ speech ‘I'll do it!’ Tom declared.
•~ that… He declared that he was in love with her.
•~ sth Few people dared to declare their opposition to the regime.
•~ yourself + adj./noun She declared herself extremely hurt by his lack of support.
3. transitive ~ sth to tell the tax authorities how much money you have earned
• All income must be declared.
4. transitive ~ sth to tell customs officers (= at the border of a country) that you are carrying goods on which you should pay tax
• Do you have anything to declare?
5. intransitive (in ↑cricket)to decide to end your ↑innings (= the period during which your team is batting ) before all your players have batted
• England declared at 224 for 4 (= 4 batsmen had scored 224 ↑runs ).
Derived: ↑declare against somebody ▪ ↑declare for somebody
Verb forms:

Word Origin:
Middle English: from Latin declarare, from de- ‘thoroughly’ + clarare ‘make clear’ (from clarus ‘clear’).

Thesaurus:
declare verb T
•The president declared a state of emergency.
announce • • state • • say • |formal proclaim • • pronounce • |especially journalism indicate •
declare/announce/state/say/proclaim/indicate sth to sb
declare/announce/state/say/proclaim/indicate that…
declare/announce/state/proclaim sb/sth to be sth
declare/announce/state/proclaim/pronounce sth formally/officially
Declare or announce? Declare is used more often for giving judgments; announce is used more often for giving facts:
•The painting was declared to be a forgery.
✗ The painting was announced to be a forgery.:
•They haven't formally announced their engagement yet.
✗ They haven't formally declared their engagement yet.

Synonyms:
declare
state • indicate • announce
These words all mean to say sth, usually firmly and clearly and often in public.
declare • (rather formal) to say sth officially or publicly; to state sth firmly and clearly: ▪ to declare war ◇ ▪ The painting was declared to be a forgery.
state • (rather formal) to formally write or say sth, especially in a careful and clear way: ▪ He has already stated his intention to run for election.
indicate • (rather formal) to state sth, sometimes in a way that is slightly indirect: ▪ During our meeting, he indicated his willingness to cooperate.
announce • to tell people officially about a decision or plans; to give information about sth in a public place, especially through a loudspeaker; to say sth in a loud and/or serious way: ▪ They haven't formally announced their engagement yet. ◇ ▪ Has our flight been announced yet?
declare or announce?
Declare is used more often for giving judgements; announce is used more often for giving facts: The painting was announced to be a forgery. ◇ They haven't formally declared their engagement yet.
to declare/state/indicate/announce that…
to declare/state sb/sth to be sth
to declare/state/indicate/announce your intention to do sth
to declare/state/announce sth formally/publicly/officially
to declare/state/announce sth firmly/confidently

Example Bank:
•‘I'm going to win!’ he declared confidently.
•‘You're here,’ she declared simply.
•He declared his true feelings to her.
•He has virtually declared war on his own party.
•He has virtually declared war on the right-wingers in his party.
•Martial law was immediately declared.
•She proudly declared that she had once been introduced to the Queen.
•She proudly declared that she had once met John Wayne.
•Stravinsky famously declared that music expressed nothing.
•The communists had unilaterally declared a ceasefire.
•We, the people of Indonesia, hereby declare Indonesia's independence.
•‘I'll do it!’Tom declared.
•The day was declared a public holiday.
•The president declared a state of emergency.