There are 2 main definitions of aid in English:

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aid1

Line breaks: aid
Pronunciation: /eɪd
 
/

noun

1 [mass noun] Help, typically of a practical nature: he saw the pilot slumped in his cockpit and went to his aid she walked with the aid of a Zimmer frame
More example sentences
  • SIR - I would like to express my heartfelt thanks to the young couple who came to my aid on Friday evening when I was stranded in my car in a flood near Carleton.
  • Two passers-by came to his aid and helped to find the cause of his injury.
  • It is likely the victim was the only person in the carriage because no-one came to his aid or offered him help when the attack was over.
Synonyms
1.1Financial or material help given to a country or area in need: 700,000 tons of food aid [as modifier]: an aid agency
More example sentences
  • It specializes in bringing food and other material aid to war-torn areas.
  • They also gave food and material aid to as many as 10,269 people to help reconstruct destroyed homes.
  • Eventually, they turned to their church and asked for some financial aid to buy food and basics and got it.
Synonyms
patronage, sponsorship, backing;
debt remission
informal a leg up, shot in the arm
1.2 [count noun] A source of help or assistance: exercise is an important aid to recovery after heart attacks a teaching aid
More example sentences
  • This allows the instructor to use the pistol as a teaching aid to show students where the sharp edges on their guns need to be relieved.
  • This is an aid to bring more security in the post-Cold War era.
  • Tools and training aids are available to assist your unit to train safety and succeed on the battlefield.
2 historical A grant of subsidy or tax to a king or queen.
Example sentences
  • In 1678, he spoke in favour of giving an aid to the king, and the following month obtained a commission for raising an independent company of foot, and was appointed governor of Bridlington.
  • An Act for granting a Royal Aid to the King's Majesty, of Twenty-four Hundred Threescore and Seventeen Thousand and Five Hundred Pounds, to be raised, levied, and paid, in the Space of Three Years.
  • In the proceedings of the parliament of 1242, which were duly recorded and which survive as the earliest authorized report of a parliamentary debate, we find the representatives of the nation, after thoroughly discussing the expediency of a foreign war, bold enough to oppose it by refusing an aid to the king to carry it on.

verb

[with object] Back to top  
1Help or support (someone or something) in the achievement of something: women were aided in childbirth by midwives [no object]: research was conducted to aid in making decisions
More example sentences
  • I am sorry for your loss, and hope that you have the emotional, physical and spiritual support you need to aid you and your new baby to a happier outcome.
  • May you and your husband have luck quitting smoking; make use of the myriad of support networks available to aid you in the battle to quit.
  • This they easily achieved as they were aided by popular support.
Synonyms
help, assist, abet, come to the aid of, give assistance to, lend a hand to, be of service to;
avail, succour, sustain;
support, back, back up, second, stand by, uphold
1.1Promote or encourage (something): diet and exercise aid healthy skin
More example sentences
  • It has been said the butter may reduce the risk of cancer because it contains healthy bacteria which aids digestion and boosts immune response.
  • Healthy teeth mean that the child is able to eat a healthy diet, and aid the growth of the jaw.
  • Fish oil aids memory and promotes mental acuity because it makes nerve-cell membranes more fluid and more reactive to signals.
Synonyms
facilitate, promote, encourage, help, speed up, hasten, accelerate, expedite, further, boost, give a boost/lift/push to, spur on, smooth/clear the way for

Origin

late Middle English: from Old French aide (noun), aidier (verb), based on Latin adjuvare, from ad- 'towards' + juvare 'to help'.

More
  • This comes via Old French from Latin adjuvare, from ad- ‘towards’ and juvare ‘to help’.

Phrases

aid and abet

1
see abet.

in aid of

2
chiefly British In support of; for the purpose of raising money for: a charity show in aid of Leukaemia Research
More example sentences
  • Keen dancers are being urged to support a charity event in aid of a children's cancer unit.
  • Funds raised are in aid of worthy local causes and support would be greatly appreciated.
  • The quiz is in aid of Rehab and all support of this worthy cause would be appreciated.

what's (all) this in aid of?

3
British informal What is the purpose of this?

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There are 2 main definitions of aid in English:

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AID2

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Definition of aid in:

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