Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Class | Part 1 | Part 2 | Part 3 | Part 4 | Verb meaning |
| --- | --- | --- | --- | --- | --- |
| 1 | dreiban | draif | dribun | dribans | to drive |
| 2a | liugan | laug | lugun | lugans | to lie (tell untruth) |
| 2b | lūkan | lauk | lukun | lukans | to close, to shut |
| 3a | bindan | band | bundun | bundans | to bind |
| 3b | hilpan wairþan | halp warþ | hulpun waurþun | hulpans waurþans | to help to become |
| 4 | qiman bairan | qam bar | qēmun bērun | qumans baurans | to come to bear |
| 5 | lisan saiƕan | las saƕ | lēsun sēƕun | lisans saiƕans | to gather to see |
| 6 | alan | ōl | ōlun | alans | to grow, to mature |
| 7a | haitan | haihait | haihaitun | haitans | to call |
| 7b | hlaupan | haihlaup | haihlaupun | hlaupans | to leap |
| 7c | haldan fāhan | haihald faifāh | haihaldun faifāhun | haldans fāhans | to hold to catch |
| 7d | lētan saian | lailōt saisō | lailōtun saisōun | lētans saians | to allow to sow |
Question:
What is the meaning of the class 6 verbs?
Answer:
to grow, to mature