1 The importance is a perceived one, like a gesture, rather than important in practical terms. For instance, when a government apologises, it may not change much, but it could be seen as an important gesture
2 Force/make people accept your authority
3 make a conscious effort- do it deliberately
4 be bisexual
PS, if you could give the sentence where you saw the terms, it could help as meaning often changes in context.
- For Teachers