1. open [sense 2], open [sense 13]
2. phrasal verbIf a place, economy, or area of interest opens up, or if someone opens it up, more people can go there or become involved in it.
Demand is outstripping supply since the market opened up. [VERB PARTICLE]
He wanted to see how the country was opening up to the world. [VERB PARTICLE + to]
These programmes will open up markets for farmers. [VERB PARTICLE noun]
The money could open up music to more children. [V P n to n]
[Also
V n
P,
V n
P to n
] 3. phrasal verbIf something opens up opportunities or possibilities, or if they open up, they are created.
It was also felt that the collapse of the system opened up new possibilities. [VERB PARTICLE noun]
New opportunities are opening up for investors. [VERB PARTICLE]
[Also
VERB noun
PARTICLE] 4. phrasal verbIf you open up a lead in a race or competition, you get yourself into a position where you are leading, usually by quite a long way.
The Chinese team had opened up a lead of more than two minutes. [VERB PARTICLE noun]
5. phrasal verbWhen you open up a building, you unlock and open the door so that people can get in.
Three armed men were waiting when the postmaster arrived to open up the shop. [VERB PARTICLE noun]
Open up, or I break in! [VERB PARTICLE]
6. phrasal verbIf someone opens up, they start to say exactly what they think or feel.
Lorna found that people were willing to open up to her. [VERB PARTICLE + to]
See full dictionary entry for open