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mum mums
NOUN INFORMAL mother
• Sometimes a photo or an illustration is included.
mollusc molluscs
NOUN an animal with a soft body and no backbone. Snails, slugs, clams and mussels are all molluscs.
• Grammar and spelling tips provide extra information on the spelling or use of words.
different
ADJECTIVE If one thing is different from another, it is not like it.
There are two es in different.
• Some definitions tell you where to find more information at another headword.
convex
ADJECTIVE A convex surface bulges outwards, rather than being level or curving inwards.
See concave (#ulink_6a54f3e0-99f0-5472-877b-20192812085d)
ANTONYM: concave
Extra help for you
Word Wizard (#litres_trial_promo) is a special section after the A-Z to help you with your writing. It contains information on things like parts of speech, prefixes, suffixes, and punctuation. It also tells you how you can improve your spelling. There are interesting facts about where some words come from. It even has information on shapes, numbers, fractions, and angles, along with pictures.
The Earth and Space (#litres_trial_promo) is a fact-filled section with colourful pictures. This is where to look if you want to know more about the Solar System, the Earth, the Moon, the continents, and the world’s mountains, rivers, and oceans. There are also pages showing you the flags of some of the nations of the world.
Aa (#ulink_a4a95f48-1a4f-5bba-b033-a913bb4f2132)
a an
ADJECTIVE A and an are used when you talk about one of something. A is used when the next sound is a consonant: a car, a dog. An is used when the next sound is a vowel (a, e, i, o or u): an apple, an elephant.
abacus abacuses
NOUN a frame with beads that slide along rods, used for counting
[from Greek abax meaning board covered with sand for doing sums on]
abandon abandons, abandoning, abandoned
VERB If you abandon someone or something, you leave them or give them up for good. • He abandoned all hope of catching the train on time.
abbey abbeys
NOUN a church with buildings attached to it in which monks or nuns live
abbreviation abbreviations
NOUN a short form of a word or phrase • N is an abbreviation for North.
abdomen abdomens
NOUN the front part of your body below your chest, containing your stomach and intestines
abdominal ADJECTIVE
ability abilities
NOUN If you have ability, you have the intelligence and skill to do things.
able
ADJECTIVE If you are able to do something, you can do it.
ANTONYM: unable
abnormal
ADJECTIVE not normal or usual
abnormally ADVERB
aboard
PREPOSITION OR ADVERB If you are aboard a plane or a ship you are on it.
Aborigine Aborigines
NOUN someone descended from the people who were living in Australia before the European settlers arrived
about
PREPOSITION OR ADVERB 1 If you talk or write about a particular thing, you say things that are to do with that subject. • a book about London
2 You say about in front of a number to show it is not exact. • about two o’clock
PHRASE 3 If you are about to do something, you are just going to do it. • He was about to leave.
above
PREPOSITION OR ADVERB If one thing is above another, it is higher up. • The plane was flying above the clouds.
ANTONYM: below
abroad
ADVERB If you go abroad, you go to another country.
abscess abscesses
NOUN a painful swelling on the body, which contains pus
abseil abseils, abseiling, abseiled
VERB If you abseil down a rock face, you use ropes to go down it.
absent
ADJECTIVE If you are absent from a place, you are not there.
ANTONYM: present
absolute
ADJECTIVE 1 total and complete • absolute darkness
2 having total power • an absolute ruler
absolutely
ADVERB If you are absolutely sure about something, you are completely sure of it.
absorb absorbs, absorbing, absorbed
VERB If something absorbs liquid or gas, it soaks it up. • Plants absorb moisture from the soil.
absorbent
ADJECTIVE If something is absorbent, it soaks up liquids easily.
abstract
ADJECTIVE 1 An abstract idea is based on thoughts and ideas rather than on real objects or happenings, for example bravery and happiness.
2 Abstract art uses shapes rather than images of people or objects.
3 In grammar, abstract nouns refer to qualities or ideas, rather than physical objects, for example happiness.
See noun (#litres_trial_promo)
absurd
ADJECTIVE Something that is absurd is stupid or ridiculous.
abuse abuses, abusing, abused
Said “ab-yooss” NOUN 1 cruel treatment of someone
2 rude and unkind remarks
Said “ab-yooz” VERB 3 To abuse someone is to treat them cruelly.
4 If you abuse someone, you speak to them in a rude and insulting way.
abysmal
ADJECTIVE very bad
abysmally ADVERB
academic academics
ADJECTIVE 1 Academic work is done in school, college and university.
NOUN 2 someone who teaches or does research in a college or university
academy academies
NOUN 1 a school or college, usually one that specializes in a particular subject • the Royal Academy of Arts
2 an organization of scientists, writers, artists or musicians
accelerate accelerates, accelerating, accelerated
VERB To accelerate is to speed up.
ANTONYM: decelerate
acceleration
NOUN the rate at which the speed of something increases
accent accents
NOUN a way of pronouncing a language • She had an Australian accent.
accept accepts, accepting, accepted
VERB 1 If you accept something, you say yes to it or you take it from someone. • She accepted our invitation to the party.
2 If you accept a situation, you realize that it cannot be changed. • I accepted that I would have to work hard before my exams.
