ornamental, moped,

or‧na‧men‧tal

designed to make something look attractive rather than to be used for a particular purpose:

ornamental gardens

The pillars in the centre are purely ornamental.

Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

mo‧ped [countable]

a small two-wheeled vehicle with an engine [↪ motorcycle]

Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

trig‧ger [countable]

1 the part of a gun that you pull with your finger to fire it

pull/squeeze the trigger

He took aim and squeezed the trigger.

2

 be the trigger (point) (for something)

to be the thing that quickly causes a serious problem:

The hijacking became a trigger point for military action.

Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

board

1 [countable]

information

a flat wide piece of wood, plastic etc that you can use to show information

on a board

The plan of the new building is displayed on a board at the back of the room.

I've put a list of names up on the board.

I'll check the departure board for train times.

➔ billboard, blackboard, noticeboard, scoreboard

2

for putting things on

 [countable] a flat piece of wood, plastic, card etc that you use for a particular purpose such as cutting things on, or for playing indoor games:

Martha was chopping vegetables on a wooden board.

a chess board

➔ breadboard, cheeseboard, chopping board

3 also Board

group of people

 [countable also + plural verb] British English a group of people in a company or other organization who make the rules and important decisions:

a board meeting

a board member

board of

The Board of Directors met yesterday.

There was disagreement among the agency's board of governors.

The decision was discussed and agreed at board level.

sit on a board/have a seat on a board (=be a member of a board)

He gave up his seat on the board after 40 years.

4

in names

 Board

used in the name of some organizations:

the New York State Board of Elections

the British Boxing Board of Control

5

in building

 [countable] a long thin flat piece of wood used for making floors, walls, fences etc:

We'll have to take the boards up to check the wiring.

➔ floorboard

6

 on board

a) on a ship, plane, or spacecraft [= aboard]:

There are 12 children on board the ship.

b) involved with something or working for an organization:

Supporters of the treaty say that it will be necessary to have the United States on board.

He came on board in the late Sixties and spent two decades with the agency.

7

meals

 [uncountable] the meals that are provided for you when you pay to stay somewhere:

In the nursing home she will have to pay for room and board.

The landlord provides board and lodging (=meals and a place to stay).➔ full board, half board

8

 go by the board

if an idea, way of behaving, or plan goes by the board, it fails to happen, ends, or is no longer possible:

Loyalty has gone by the board.

9

in water sports

 [countable] a surfboard or sailboard

10

 across the board

if something happens or is done across the board, it affects everyone in a particular group, place etc:

The changes will affect local authorities across the board.

We find jobs for people right across the board from chief executives to cleaners.

11

 take something on board

to listen to and accept a suggestion, idea etc:

The school refused to take any of the parents' criticisms on board.

12

electricity

 [countable] a circuit board

13

theatre

 the boards

 [plural] the stage in a theatre

 ➔ tread the boards

 at tread1 (7)

14

sports area

 boards

 [plural] American English the low wooden wall around the area in which you play ice hockey

15

 college/medical boards

American English examinations that you take in the US when you formally ask to be accepted as a student at a college or medical school

➔ above board, diving board, drawing board, ironing board,sounding board

 ; ➔ sweep the board

 at sweep1 (11)

Definition from the Longman Dictionary of Contemporary English