Home » English Books » Big vocabulary list A to Z » Big vocabulary O list learning English vocabulary

Vocabulary beginning with O - list learning English basics

What will I learn from the English lesson a list vocabulary beginning with O?

This lesson is a list of vocabulary beginning with O to help when you are unsure what type of word it is. It is important not to try and remember the vocabulary, but just to use the list as a reference guide to help you.

How do I use this English book of vocabulary A to Z?

Click on each letter of the alphabet to get the list of the idioms with an explanation of each.

[ A ] [ B ] [ C ] [ D ] [ E ] [ F ] [ G ] [ H ] [ I ] [ J ] [ K ] [ L ] [ M ] [ N ] [ O ] [ P ] [ Q ] [ R ] [ S ] [ T ] [ U ] [ V ] [ W ] [ X ] [ Y ] [ Z ]

** Warning the list does not contain every word and will be added to over time **

Abbreviations that are used in the vocabulary List are:

abbrev abbreviation or acronym
adj adjective
adv adverb
Am Eng American English
Br Eng British English
conj conjunction
det determiner
exclam exclamation
int interjection
n noun
phr v phrasal verb
pl plural
prep preposition
prep phr prepositional phrase
pron pronoun
sing singular
v verb

Vocabulary beginning with O

object (n)
obvious (adj)
occasion (n)
occasional (adj)
occupation (n)
ocean (n)
o'clock (adv)
of (prep)
of course (adv)
off (adv & prep)
• It fell off the table. (prep)
• The meeting is off. (adv)
• I've got the afternoon off. (adv)
offer (n & v)
office (n)
officer (n)
often (adv)
oh! (int)
oh dear! (int)
oil (n)
OK/O.K./okay (adj)
old (adj)
old-fashioned (adj)
omelette (n)
on (adv & prep)
on board (prep phr)
on business (prep phr)
on fire (prep phr)
on foot (prep phr)
on holiday (prep phr)
on loan (prep phr)
on purpose (prep phr)
on request (prep phr)
on sale (prep phr)
on time (prep phr)
once (adv)
• once a year
• I once saw him dancing.
one (pron & det)
oneself (pron)
one-way (adj) Page 22
onion (n)
online (adv & adj)
• to book/buy something online (adv)
• an online facility (adj)
only (adj & adv)
onto (prep)
open (adj & v)
opening hours (n pl)
opera (n)
operate (v)
operation (n)
operator (n)
opinion (n)
opportunity (n)
opposite (adj, n, prep & adv)
option (n)
or (conj)
orange (adj & n)
orchestra (n)
order (conj, n & v)
• in order to (conj)
• to put something in order (n)
• to order a meal (v)
ordinary (adj)
organisation (n)
organise (v)
original (adj)
other (adj, pron & det)
our (det)
ours (pron)
ourselves (pron)
out (adv)
out of (prep)
out of date (prep phr)
out of doors (prep phr)
out of order (prep phr)
out of stock (prep phr)
out of work (prep phr)
outdoor (adj)
outdoors (adv)
outside (adv, n, prep & adj)
oven (n)
over (adv & prep)
• I'm going over the road. (prep)
• over 40 people (more than) (adv)
• to be over (finished) (adv)
• Several birds were flying over the roof
of the school. (prep)
overnight (adj & adv)
overtake (v)
owe (v)
own (adj & v)
• my own pen (adj)
• to own a car (v)
owner (n)