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being used

Excuse me — is this seat occupied?

busy

This work will keep me occupied all week.

oc • cur © AWL / э ' Ьэп / verb ( oc • curs , oc cur • ring , oc • curred )

( formal )

to happen

The accident occurred this morning.

occur to someone

to come into someone's mind

It occurred to me that you might like to come.

oc • cur • rence AWL / э 'Ьэгэш / noun [count]

( formal )

something that happens

Identity theft is now a very common occurrence.

.cean © / 'oujn/ noun ( GEOGRAPHY)

[ noncount ] the salt water that covers most of the surface of the earth

People were swimming in the ocean. Ocean levels are rising.

Ocean [ count ] one of the five large areas of salt water on Earth

the Pacific Ocean

o'clock / э klak / adverb

used after the numbers one to twelve for saying the time I left home at four o'clock and arrived in Los Angeles at five thirty. Grammar

Be careful! O'clock is only used with full hours. You cannot say "at five thirty o'clock."

oc • ta • gon

/ aktsgan / noun [count] ( MATH ) a shape with eight straight sides ►oc • tag • o • nal

/ ak' tregsnl / adjective an octagonal coin

Oc .to . ber © / ak'toubr/ noun

[ count, noncount ] ( abbreviation Oct. ) the tenth month of the year

oc • to • pus / ' aktspss / noun [ count ] ( plural oc • to • pus • es )

squid

an ocean animal with a soft body and eight long arms (called tentacles )

octopus

odd © ИП L / ad / adjective ( odd • e , )dd est )

strange or unusual

It's odd that he left without telling anyone. —SYNONYM strange

( MATH ) not able to be divided by two

1,3,5, and 7 are all odd numbers . —ANTONYM even

the odd one out

one that is different from all the others

"Apple," "orange," "cabbage" — which is the odd one out?

odd • ly / ' adli / adverb

in a strange or unusual way

She behaved very oddly. —SYNONYM strangely

oddsaw п / adz / noun the odds [ plural ]

used for saying how likely something is

The odds are that he'll win (= he'll probably win ) .

The odds are against us (= we will probably not succeed ) .

odds and ends ( informal )

different small things that are not important a box of odds and ends

• dor / ' oudsr / noun [ count ] ( formal )

a smell, especially a bad smell Of© / sv ; av / preposition

belonging to or connected with someone or something the back of the chair

What's the name of this mountain? the time of the American Civil War the arrival of the president

used for saying what something is or what something is made of

a piece of wood

a cup of coffee

Is this shirt made of cotton?

used for showing that someone or something is part of a group

one of the girls some of his friends

used after an amount, etc. a gallon of water

the fourth of July

used with some adjectives and verbs I'm proud of you.

This perfume smells of roses.

used for giving your opinion about someone's behavior That's very kind of you.

Off© / of ; af / preposition, adverb

down or away from something He fell off the roof.

We got off the bus. The thief ran off.

used for talking about removing something If you're hot, take your coat off.

Can you clean that paint off the carpet?

—ANTONYM on

away from a place; at a distance in space or time I must be off (= leave ) soon .

Summer is still a long way off.

joined to something and leading from it The bathroom is off the bedroom.

not connected; not working