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
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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.